21120968312 has 16 divisors (see below), whose sum is σ = 39952275840. Its totient is φ = 10467028096.

The previous prime is 21120968273. The next prime is 21120968321. The reversal of 21120968312 is 21386902112.

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, 11681048 + ... + 11682855.

It is an arithmetic number, because the mean of its divisors is an integer number (2497017240).

Almost surely, 2^21120968312 is an apocalyptic number.

It is an amenable number.

21120968312 is a deficient number, since it is larger than the sum of its proper divisors (18831307528).

21120968312 is a wasteful number, since it uses less digits than its factorization.

21120968312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23364022 (or 23364018 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 21120968312 in words is "twenty-one billion, one hundred twenty million, nine hundred sixty-eight thousand, three hundred twelve".