21112502252 has 12 divisors (see below), whose sum is σ = 37012507896. Its totient is φ = 10537500000.

The previous prime is 21112502237. The next prime is 21112502269. The reversal of 21112502252 is 25220521112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4685249 + ... + 4689752.

It is an arithmetic number, because the mean of its divisors is an integer number (3084375658).

Almost surely, 2^21112502252 is an apocalyptic number.

It is an amenable number.

21112502252 is a deficient number, since it is larger than the sum of its proper divisors (15900005644).

21112502252 is a wasteful number, since it uses less digits than its factorization.

21112502252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9375568 (or 9375566 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 21112502252 in words is "twenty-one billion, one hundred twelve million, five hundred two thousand, two hundred fifty-two".