21132300312 has 48 divisors (see below), whose sum is σ = 57529896840. Its totient is φ = 7007597568.

The previous prime is 21132300307. The next prime is 21132300349. The reversal of 21132300312 is 21300323112.

21132300312 is a `hidden beast` number, since 21 + 1 + 32 + 300 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 746478 + ... + 774269.

Almost surely, 2^21132300312 is an apocalyptic number.

It is an amenable number.

21132300312 is an abundant number, since it is smaller than the sum of its proper divisors (36397596528).

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

21132300312 is a wasteful number, since it uses less digits than its factorization.

21132300312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520952 (or 1520945 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21132300312 its reverse (21300323112), we get a palindrome (42432623424).

The spelling of 21132300312 in words is "twenty-one billion, one hundred thirty-two million, three hundred thousand, three hundred twelve".