21321112312 has 16 divisors (see below), whose sum is σ = 39986961840. Its totient is φ = 10657922496.

The previous prime is 21321112279. The next prime is 21321112321.

21321112312 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 21321112312.

It is a congruent number.

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, 294588 + ... + 359755.

It is an arithmetic number, because the mean of its divisors is an integer number (2499185115).

Almost surely, 2^21321112312 is an apocalyptic number.

It is an amenable number.

21321112312 is a deficient number, since it is larger than the sum of its proper divisors (18665849528).

21321112312 is a wasteful number, since it uses less digits than its factorization.

21321112312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658422 (or 658418 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The spelling of 21321112312 in words is "twenty-one billion, three hundred twenty-one million, one hundred twelve thousand, three hundred twelve".