22012931521 has 16 divisors (see below), whose sum is σ = 25247361024. Its totient is φ = 18801011664.

The previous prime is 22012931489. The next prime is 22012931527. The reversal of 22012931521 is 12513921022.

It is a cyclic number.

It is not a de Polignac number, because 22012931521 - 2⁵ = 22012931489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22012931521.

It is not an unprimeable number, because it can be changed into a prime (22012931527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5786406 + ... + 5790208.

It is an arithmetic number, because the mean of its divisors is an integer number (1577960064).

Almost surely, 2^22012931521 is an apocalyptic number.

It is an amenable number.

22012931521 is a deficient number, since it is larger than the sum of its proper divisors (3234429503).

22012931521 is a wasteful number, since it uses less digits than its factorization.

22012931521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 22012931521 in words is "twenty-two billion, twelve million, nine hundred thirty-one thousand, five hundred twenty-one".