21132213232 has 80 divisors (see below), whose sum is σ = 45917686080. Its totient is φ = 9354240000.

The previous prime is 21132213209. The next prime is 21132213247. The reversal of 21132213232 is 23231223112.

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, 899232 + ... + 922432.

It is an arithmetic number, because the mean of its divisors is an integer number (573971076).

Almost surely, 2^21132213232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21132213232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22958843040).

21132213232 is an abundant number, since it is smaller than the sum of its proper divisors (24785472848).

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

21132213232 is a wasteful number, since it uses less digits than its factorization.

21132213232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23402 (or 23396 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 21132213232 its reverse (23231223112), we get a palindrome (44363436344).

The spelling of 21132213232 in words is "twenty-one billion, one hundred thirty-two million, two hundred thirteen thousand, two hundred thirty-two".