Compare 1209 vs 1221
| Property | 1209 | 1221 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 3 | 3 |
| Prime factorization | 31 × 131 × 311 | 31 × 111 × 371 |
| Prime factorization | 3 × 13 × 31 | 3 × 11 × 37 |
| Divisors count | 8 | 8 |
| Divisors | 1, 3, 13, 31, 39, 93, 403, 1209 | 1, 3, 11, 33, 37, 111, 407, 1221 |
| Number of properties | 0 | 0 |
| Roman numberals | MCCIX | MCCXXI |
| Base 2 | 100101110012 | 100110001012 |
| Base 3 | 11222103 | 12000203 |
| Base 4 | 1023214 | 1030114 |
| Base 5 | 143145 | 143415 |
| Base 6 | 53336 | 53536 |
| Base 7 | 33457 | 33637 |
| Base 8 | 22718 | 23058 |
| Base 9 | 15839 | 16069 |
| Base 10 | 120910 | 122110 |
| Base 11 | 9aa11 | a1011 |
| Base 12 | 84912 | 85912 |
| Base 13 | 72013 | 72c13 |
| Base 14 | 62514 | 63314 |
| Base 15 | 55915 | 56615 |
| Base 16 | 4b916 | 4c516 |