Compare 121 vs 142
| Property | 121 | 142 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 112 | 21 × 711 |
| Prime factorization | 11 × 11 | 2 × 71 |
| Divisors count | 3 | 4 |
| Divisors | 1, 11, 121 | 1, 2, 71, 142 |
| Number of properties | 1 | 1 |
| Semiprimes | 40th | 47th |
| Roman numberals | CXXI | CXLII |
| Base 2 | 11110012 | 100011102 |
| Base 3 | 111113 | 120213 |
| Base 4 | 13214 | 20324 |
| Base 5 | 4415 | 10325 |
| Base 6 | 3216 | 3546 |
| Base 7 | 2327 | 2627 |
| Base 8 | 1718 | 2168 |
| Base 9 | 1449 | 1679 |
| Base 10 | 12110 | 14210 |
| Base 11 | 10011 | 11a11 |
| Base 12 | a112 | ba12 |
| Base 13 | 9413 | ac13 |
| Base 14 | 8914 | a214 |
| Base 15 | 8115 | 9715 |
| Base 16 | 7916 | 8e16 |