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A duotrigintillion is equal to $$10^{99}$$ in the short scale, or $$10^{192}$$ in the long scale by Conway-Wechsler system.[1][2][3][4][5]

In the long scale which is commonly used in France and Germany, $$10^{99}$$ is called sexdecilliard.

Sbiis Saibian gave the name triginti-deutillion[6] or googolchunk referring to the value of this number.[7]

The number is also called pen-bitillion by SuperJedi224, and it's equal to H*(25) = H*(32) using H* function.[8]

## Decimal expansion

1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

## Approximations

Notation Lower bound Upper bound
Scientific notation $$1\times10^{99}$$
Arrow notation $$10\uparrow99$$
Steinhaus-Moser Notation 56[3] 57[3]
Copy notation 9[99] 10[50]
Taro's multivariable Ackermann function A(3,325) A(3,326)
Pound-Star Notation #*(12,11,8,3,8,4,1)*9 #*(13,11,8,3,8,4,1)*9
BEAF {10,99}
Bashicu matrix system (0)(0)(0)(0)(0)[1240] (0)(0)(0)(0)(0)[1241]
Hyperfactorial array notation 69! 70!
Fast-growing hierarchy $$f_2(320)$$ $$f_2(321)$$
Hardy hierarchy $$H_{\omega^2}(320)$$ $$H_{\omega^2}(321)$$
Slow-growing hierarchy $$g_{\omega^{\omega9+9}}(10)$$

### List of prefixed numbers derived from trigintillion

Name Short scale Long scale
untrigintillion 1096 10186
duotrigintillion 1099 10192
tretrigintillion 10102 10198
quattuortrigintillion 10105 10204
quintrigintillion 10108 10210
sextrigintillion 10111 10216
septentrigintillion 10114 10222
octotrigintillion 10117 10228
novemtrigintillion 10120 10234

## Sources

Numbers By SuperJedi224

Fibonacci Numbers

Level One

Level Two

#*

#**

H#*

#*{}

#*<<>>

H#*<<>>

Bingol series

Based on the Faxul

Other factorials

Googovipleccix family

Graham Sequence Numbers

-Illion numbers

Level One

Level Three

Level Four

"-Illion" numbers by SuperJedi224

Level One

Level Three

Level Four

-minutia group
n-ary numbers with multipliers
Eyelash mite group: eyelash mite-speck · eyelash mite-crumb · eyelash mite-chunk · (binary/ternary/octal)eyelash mite · eyelash mite-bunch · eyelash mite-crowd · eyelash mite-swarm
Dust mite group: dust mite-speck · dust mite-crumb · dust mite-chunk · (binary/ternary/octal)dust mite · dust mite-bunch · dust mite-crowd · dust mite-swarm
Cheese mite group: cheese mite-speck · cheese mite-crumb · cheese mite-chunk · (binary/ternary/octal)cheese mite · cheese mite-bunch · cheese mite-crowd · cheese mite-swarm
Clover mite group: clover mite-speck · clover mite-crumb · clover mite-chunk · (binary/ternary/octal)clover mite · clover mite-bunch · clover mite-crowd · clover mite-swarm
Pipsqueak group: (binary/ternary/octal)pipsqueak
Little squeaker group: (binary/ternary/octal)little squeaker
Small fry group: (binary/ternary/octal)small fry
Guppy group: (binary/ternary/octal)guppyspeck · (binary/ternary/octal)guppycrumb · (binary/ternary/octal)guppychunk · (ternary/quaternary/quinary/duodecimal/hexadecimal/vigesimal/sexagesimal)guppy(bit/byte)
Minnow group: (binary/ternary/octal)minnowspeck · (binary/ternary/octal)minnowcrumb · (binary/ternary/octal)minnowchunk · (ternary)minnow(bit/byte)
Goby group: (binary/ternary/octal)gobyspeck · (binary/ternary/octal)gobycrumb · (binary/ternary/octal)gobychunk · (ternary)goby(bit/byte)