Centxi

The centxi is equal to ( − 1) / 9 = 11,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111. The term was coined by André Joyce.

Its prime factorization is 11 × 41 × 73 × 101 × 137 × 251 × 271 × 401 × 1,201 × 1,601 × 3,541 × 5,051 × 9,091 × 21,401 × 25,601 × 27,961 × 60,101 × 1,676,321 × 7,019,801 × 5,964,848,081 × 182,521,213,001 × 14,103,673,319,201 × 78,875,943,472,201 × 1,680,588,011,350,901 × 129,694,419,029,057,750,551,385,771,184,564,274,499,075,700,947,656,757,821,537,291,527,196,801.

Etymology
The 2 parts of the name, “cent” and “xi”, mean 100 and 11, respectively.