21310562312 has 32 divisors (see below), whose sum is σ = 43037019480. Its totient is φ = 9834255360.

The previous prime is 21310562297. The next prime is 21310562327. The reversal of 21310562312 is 21326501312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21310562297) and next prime (21310562327).

It can be written as a sum of positive squares in 4 ways, for example, as 8848412356 + 12462149956 = 94066^2 + 111634^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1278512 + ... + 1295072.

Almost surely, 2^21310562312 is an apocalyptic number.

It is an amenable number.

21310562312 is an abundant number, since it is smaller than the sum of its proper divisors (21726457168).

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

21310562312 is a wasteful number, since it uses less digits than its factorization.

21310562312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28953 (or 28949 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 21310562312 in words is "twenty-one billion, three hundred ten million, five hundred sixty-two thousand, three hundred twelve".