Compare 121 vs 155
| Property | 121 | 155 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 112 | 51 × 311 |
| Prime factorization | 11 × 11 | 5 × 31 |
| Divisors count | 3 | 4 |
| Divisors | 1, 11, 121 | 1, 5, 31, 155 |
| Number of properties | 1 | 1 |
| Semiprimes | 40th | 51st |
| Roman numberals | CXXI | CLV |
| Base 2 | 11110012 | 100110112 |
| Base 3 | 111113 | 122023 |
| Base 4 | 13214 | 21234 |
| Base 5 | 4415 | 11105 |
| Base 6 | 3216 | 4156 |
| Base 7 | 2327 | 3117 |
| Base 8 | 1718 | 2338 |
| Base 9 | 1449 | 1829 |
| Base 10 | 12110 | 15510 |
| Base 11 | 10011 | 13111 |
| Base 12 | a112 | 10b12 |
| Base 13 | 9413 | bc13 |
| Base 14 | 8914 | b114 |
| Base 15 | 8115 | a515 |
| Base 16 | 7916 | 9b16 |