21303120132 has 72 divisors (see below), whose sum is σ = 61556331200. Its totient is φ = 6085222848.

The previous prime is 21303120089. The next prime is 21303120133. The reversal of 21303120132 is 23102130312.

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

It is not an unprimeable number, because it can be changed into a prime (21303120133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1714719 + ... + 1727097.

Almost surely, 2^21303120132 is an apocalyptic number.

It is an amenable number.

21303120132 is an abundant number, since it is smaller than the sum of its proper divisors (40253211068).

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

21303120132 is a wasteful number, since it uses less digits than its factorization.

21303120132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19225 (or 19220 counting only the distinct ones).

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

Adding to 21303120132 its reverse (23102130312), we get a palindrome (44405250444).

The spelling of 21303120132 in words is "twenty-one billion, three hundred three million, one hundred twenty thousand, one hundred thirty-two".