21112651625 has 64 divisors (see below), whose sum is σ = 29877120000. Its totient is φ = 14778086400.

The previous prime is 21112651603. The next prime is 21112651639. The reversal of 21112651625 is 52615621112.

It is not a de Polignac number, because 21112651625 - 2²⁴ = 21095874409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112651591 and 21112651600.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4220876 + ... + 4225874.

It is an arithmetic number, because the mean of its divisors is an integer number (466830000).

Almost surely, 2^21112651625 is an apocalyptic number.

21112651625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21112651625 is a deficient number, since it is larger than the sum of its proper divisors (8764468375).

21112651625 is a wasteful number, since it uses less digits than its factorization.

21112651625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163 (or 5153 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The spelling of 21112651625 in words is "twenty-one billion, one hundred twelve million, six hundred fifty-one thousand, six hundred twenty-five".