21202131232 has 96 divisors (see below), whose sum is σ = 43501086720. Its totient is φ = 10164510720.

The previous prime is 21202131221. The next prime is 21202131241. The reversal of 21202131232 is 23213120212.

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, 34929073 + ... + 34929679.

It is an arithmetic number, because the mean of its divisors is an integer number (453136320).

Almost surely, 2^21202131232 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 21202131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21750543360).

21202131232 is an abundant number, since it is smaller than the sum of its proper divisors (22298955488).

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

21202131232 is a wasteful number, since it uses less digits than its factorization.

21202131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21202131232 its reverse (23213120212), we get a palindrome (44415251444).

It can be divided in two parts, 212021 and 31232, that added together give a triangular number (243253 = T₆₉₇).

The spelling of 21202131232 in words is "twenty-one billion, two hundred two million, one hundred thirty-one thousand, two hundred thirty-two".