21132313233 has 32 divisors (see below), whose sum is σ = 30001829760. Its totient is φ = 13185024000.

The previous prime is 21132313229. The next prime is 21132313249. The reversal of 21132313233 is 33231323112.

It is not a de Polignac number, because 21132313233 - 2² = 21132313229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21132313273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11891241 + ... + 11893017.

It is an arithmetic number, because the mean of its divisors is an integer number (937557180).

Almost surely, 2^21132313233 is an apocalyptic number.

It is an amenable number.

21132313233 is a deficient number, since it is larger than the sum of its proper divisors (8869516527).

21132313233 is a wasteful number, since it uses less digits than its factorization.

21132313233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977.

The product of its digits is 1944, while the sum is 24.

Adding to 21132313233 its reverse (33231323112), we get a palindrome (54363636345).

The spelling of 21132313233 in words is "twenty-one billion, one hundred thirty-two million, three hundred thirteen thousand, two hundred thirty-three".