21132024123 has 32 divisors (see below), whose sum is σ = 33406272000. Its totient is φ = 11625901056.

The previous prime is 21132024113. The next prime is 21132024197. The reversal of 21132024123 is 32142023112.

It is not a de Polignac number, because 21132024123 - 2²² = 21127829819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21132024123.

It is not an unprimeable number, because it can be changed into a prime (21132024113) 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, 165828 + ... + 264126.

It is an arithmetic number, because the mean of its divisors is an integer number (1043946000).

Almost surely, 2^21132024123 is an apocalyptic number.

21132024123 is a deficient number, since it is larger than the sum of its proper divisors (12274247877).

21132024123 is a wasteful number, since it uses less digits than its factorization.

21132024123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98691.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21132024123 its reverse (32142023112), we get a palindrome (53274047235).

The spelling of 21132024123 in words is "twenty-one billion, one hundred thirty-two million, twenty-four thousand, one hundred twenty-three".