Compare 121 vs 123
| Property | 121 | 123 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 112 | 31 × 411 |
| Prime factorization | 11 × 11 | 3 × 41 |
| Divisors count | 3 | 4 |
| Divisors | 1, 11, 121 | 1, 3, 41, 123 |
| Number of properties | 1 | 1 |
| Semiprimes | 40th | 42nd |
| Roman numberals | CXXI | CXXIII |
| Base 2 | 11110012 | 11110112 |
| Base 3 | 111113 | 111203 |
| Base 4 | 13214 | 13234 |
| Base 5 | 4415 | 4435 |
| Base 6 | 3216 | 3236 |
| Base 7 | 2327 | 2347 |
| Base 8 | 1718 | 1738 |
| Base 9 | 1449 | 1469 |
| Base 10 | 12110 | 12310 |
| Base 11 | 10011 | 10211 |
| Base 12 | a112 | a312 |
| Base 13 | 9413 | 9613 |
| Base 14 | 8914 | 8b14 |
| Base 15 | 8115 | 8315 |
| Base 16 | 7916 | 7b16 |