21313033312 has 24 divisors (see below), whose sum is σ = 42751736496. Its totient is φ = 10455449472.

The previous prime is 21313033279. The next prime is 21313033349. The reversal of 21313033312 is 21333031312.

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, 6281628 + ... + 6285019.

It is an arithmetic number, because the mean of its divisors is an integer number (1781322354).

Almost surely, 2^21313033312 is an apocalyptic number.

It is an amenable number.

21313033312 is an abundant number, since it is smaller than the sum of its proper divisors (21438703184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21313033312 is a wasteful number, since it uses less digits than its factorization.

21313033312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12566710 (or 12566702 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21313033312 its reverse (21333031312), we get a palindrome (42646064624).

The spelling of 21313033312 in words is "twenty-one billion, three hundred thirteen million, thirty-three thousand, three hundred twelve".