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A trillion is equal to 1012 in the short scale, or 1018 in the long scale.[1]

Written out in decimal form trillion (in the short scale) is:

1000000000000

In long scale:

1000000000000000000

This number is also called tetrillion in Russ Rowlett's Greek-based naming system.[2]

Aarex Tiaokhiao gave the name tetillion, referring to the value of this number.[3] He also calls 1012 dudoocol, 12-noogol[4], or goonaoldecault, and it's equal to a(10,100,0)x[10] in Aarex's Array Notation.[5]

Username5243 gave the name niloogolnoniplex, referring to the short scale value of this number.[6]

It is also the first -illion to exceed 1010 in the short scale.

It is equal to 1 million squared in the short scale and 1 million cubed in the long scale.

Decimal

Examples

  • The nearest star to the Earth (besides the sun), Alpha Centauri, is over 26 trillion miles away.[7]
  • The human body contains somewhere around 50 trillion cells.[7]
  • There are roughly 3,500,000,000,000 fish in the world.[7]
  • The SI prefix tera- multiplies by one trillion.
  • If one sandcastle contains one million grains of sand then you could make one million sandcastles with 1 trillion grains of sand.
  • 1 trillion flops or operations per second is called a teraflop.
  • A 2016 estimate says there are 2,000,000,000,000 galaxies in the observable universe.
  • An estimate says there were 3.04 × 1012 trees on Earth in 2015.
  • Andromeda Galaxy, which is part of the same Local Group as our galaxy, contains about 1012 stars.
  • The surface of the human body houses roughly 1012 bacteria.
  • 1.9786782 × 1012 is a rough estimate of the total number of links on Wikipedia.
  • 1013 – The approximate number of known non-trivial zeros of the Riemann zeta function as of 2004.
  • As of 2013, the number of known digits of π is 12,100,000,000,000 (1.21×1013).
  • Approximately 1014 synapses in the human brain.
  • 281,474,976,710,656 (248) possible unique physical addresses on MAC-48.
  • 953,467,954,114,363 is the largest known Motzkin prime.

As a banknote denomination

Some currencies, such as the German Papiermark and the Hungarian pengő, had banknotes with this number in the denomination.

Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{12}\)
Arrow notation \(10\uparrow12\)
Steinhaus-Moser Notation 11[3] 12[3]
Copy notation 9[12] 1[13]
Taro's multivariable Ackermann function A(3,36) A(3,37)
Pound-Star Notation #*(4,2,3)*4 #*(1,2)*8
BEAF {10,12}
Hyper-E notation E12
Bashicu matrix system (0)(0)[1000]
Hyperfactorial array notation 14! 15!
Fast-growing hierarchy \(f_2(34)\) \(f_2(35)\)
Hardy hierarchy \(H_{\omega^2}(34)\) \(H_{\omega^2}(35)\)
Slow-growing hierarchy \(g_{\omega^{\omega+2}}(10)\)

For long scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{18}\)
Arrow notation \(10\uparrow18\)
Steinhaus-Moser Notation 15[3] 16[3]
Copy notation 9[18] 1[19]
Taro's multivariable Ackermann function A(3,56) A(3,57)
Pound-Star Notation #*(4,1,3)*6 #*(3,1)*13
BEAF {10,18}
Hyper-E notation E18
Bashicu matrix system (0)(0)[31622] (0)(0)[31623]
Hyperfactorial array notation 19! 20!
Fast-growing hierarchy \(f_2(54)\) \(f_2(55)\)
Hardy hierarchy \(H_{\omega^2}(54)\) \(H_{\omega^2}(55)\)
Slow-growing hierarchy \(g_{\omega^{\omega+8}}(10)\)

Gallery

Sources

  1. Trillion at Wolfram MathWorld
  2. Names for Large Numbers
  3. Aarex Tiaokhiao's illion numbers
  4. Part 1 (LAN) - Aarex Googology
  5. AAN Numbers - P1 - Aarex Googology
  6. Part 1 - My Large Numbers
  7. 7.0 7.1 7.2 Saibian, Sbiis2.1.4 - Everyday Large Numbers for a Modern World. Retrieved 2013-06-11.

See also

Main article: -illion
1–9: million · billion · trillion · quadr · quint · sext · sept · oct · non
10–19: decillion · undec · duodec · tredec · quattuordec · quindec · sexdec · septendec · octodec · novemdec
20–29: vigintillion · unvigint · duovigint · trevigint · quattuorvigint · quinvigint · sexvigint · septenvigint · octovigint · novemvigint
30–39: trigintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
40–49: quadragintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
50–59: quinquagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
60–69: sexagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
70–79: septuagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
80–89: octogintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
90–99: nonagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
100–900: centillion · unviginticent · unsexagintacent · ducent · trecent · duotrigintatrecent · quadringent · quingent · sescent · septuagintisescent · septingent · octingent · nongent
1,000–1024: millillion · dumill · trimill · quadrimill · quinmill · sexmill · septimill · octimill · nonimill · myr · centimill · micr · nan · pic · femt · att · zept · yoct
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