21323120712 has 64 divisors (see below), whose sum is σ = 54093692160. Its totient is φ = 7003123200.

The previous prime is 21323120701. The next prime is 21323120713. The reversal of 21323120712 is 21702132312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21323120713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1853137 + ... + 1864607.

It is an arithmetic number, because the mean of its divisors is an integer number (845213940).

Almost surely, 2^21323120712 is an apocalyptic number.

It is an amenable number.

21323120712 is an abundant number, since it is smaller than the sum of its proper divisors (32770571448).

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

21323120712 is a wasteful number, since it uses less digits than its factorization.

21323120712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12614 (or 12610 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The spelling of 21323120712 in words is "twenty-one billion, three hundred twenty-three million, one hundred twenty thousand, seven hundred twelve".