Compare 2021 vs 2029
| Property | 2021 | 2029 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 431 × 471 | 20291 |
| Prime factorization | 43 × 47 | 2029 |
| Divisors count | 4 | 2 |
| Divisors | 1, 43, 47, 2021 | 1, 2029 |
| Number of properties | 1 | 7 |
| Additive primes | 159th | |
| Chen primes | 189th | |
| Cuban primes 2 | 8th | |
| Long primes | 118th | |
| Primes | 308th | |
| Pythagorean primes | 149th | |
| Semiprimes | 581st | |
| Twin primes (2nd member) | 62nd | |
| Roman numberals | MMXXI | MMXXIX |
| Base 2 | 111111001012 | 111111011012 |
| Base 3 | 22022123 | 22100113 |
| Base 4 | 1332114 | 1332314 |
| Base 5 | 310415 | 311045 |
| Base 6 | 132056 | 132216 |
| Base 7 | 56157 | 56267 |
| Base 8 | 37458 | 37558 |
| Base 9 | 26859 | 27049 |
| Base 10 | 202110 | 202910 |
| Base 11 | 157811 | 158511 |
| Base 12 | 120512 | 121112 |
| Base 13 | bc613 | c0113 |
| Base 14 | a4514 | a4d14 |
| Base 15 | 8eb15 | 90415 |
| Base 16 | 7e516 | 7ed16 |