Compare 202118 vs 202121
| Property | 202118 | 202121 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 71 × 144371 | 2021211 |
| Prime factorization | 2 × 7 × 14437 | 202121 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 7, 14, 14437, 28874, 101059, 202118 | 1, 202121 |
| Number of properties | 0 | 6 |
| Chen primes | 7591st | |
| Harmonic primes | 6814th | |
| Isolated primes | 13812th | |
| Primes | 18159th | |
| Pythagorean primes | 9066th | |
| Sexy primes (1st member) | 4332nd | |
| Roman numberals | ||
| Base 2 | 1100010101100001102 | 1100010101100010012 |
| Base 3 | 1010210202123 | 1010210202223 |
| Base 4 | 3011120124 | 3011120214 |
| Base 5 | 224314335 | 224314415 |
| Base 6 | 41554226 | 41554256 |
| Base 7 | 15011607 | 15011637 |
| Base 8 | 6126068 | 6126118 |
| Base 9 | 3372259 | 3372289 |
| Base 10 | 20211810 | 20212110 |
| Base 11 | 12894411 | 12894711 |
| Base 12 | 98b7212 | 98b7512 |
| Base 13 | 70cc713 | 70cca13 |
| Base 14 | 5393014 | 5393314 |
| Base 15 | 3ed4815 | 3ed4b15 |
| Base 16 | 3158616 | 3158916 |