21312312110 has 32 divisors (see below), whose sum is σ = 39057790464. Its totient is φ = 8371300000.

The previous prime is 21312312101. The next prime is 21312312143. The reversal of 21312312110 is 1121321312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118415 + ... + 238005.

It is an arithmetic number, because the mean of its divisors is an integer number (1220555952).

Almost surely, 2^21312312110 is an apocalyptic number.

21312312110 is a deficient number, since it is larger than the sum of its proper divisors (17745478354).

21312312110 is a wasteful number, since it uses less digits than its factorization.

21312312110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119920.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21312312110 its reverse (1121321312), we get a palindrome (22433633422).

The spelling of 21312312110 in words is "twenty-one billion, three hundred twelve million, three hundred twelve thousand, one hundred ten".