| Base | Representation |
|---|---|
| bin | 1001101001000100001101… |
| … | …11010110000000000110010 |
| 3 | 2210001220122022111001121100 |
| 4 | 10310202012322300000302 |
| 5 | 10234334122330333020 |
| 6 | 113032055534305230 |
| 7 | 4315544554315560 |
| oct | 464420672600062 |
| 9 | 83056568431540 |
| 10 | 21202222121010 |
| 11 | 68348a2712577 |
| 12 | 2465171358216 |
| 13 | baa490076a38 |
| 14 | 53429b940a30 |
| 15 | 26b7b9baca90 |
| hex | 134886eb0032 |
21202222121010 has 192 divisors, whose sum is σ = 66869934393600. Its totient is φ = 4549997408256.
The previous prime is 21202222120991. The next prime is 21202222121029. The reversal of 21202222121010 is 1012122220212.
It is a happy number.
21202222121010 is a `hidden beast` number, since 21 + 202 + 2 + 221 + 210 + 10 = 666.
It is an interprime number because it is at equal distance from previous prime (21202222120991) and next prime (21202222121029).
It is a super-3 number, since 3×212022221210103 (a number of 41 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1960261 + ... + 6800519.
It is an arithmetic number, because the mean of its divisors is an integer number (348280908300).
Almost surely, 221202222121010 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21202222121010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33434967196800).
21202222121010 is an abundant number, since it is smaller than the sum of its proper divisors (45667712272590).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21202222121010 is a wasteful number, since it uses less digits than its factorization.
21202222121010 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4840705 (or 4840702 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 18.
Adding to 21202222121010 its reverse (1012122220212), we get a palindrome (22214344341222).
The spelling of 21202222121010 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, one hundred twenty-one thousand, ten".
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