21323232120 has 64 divisors (see below), whose sum is σ = 63995634720. Its totient is φ = 5683889664.

The previous prime is 21323232043. The next prime is 21323232131. The reversal of 21323232120 is 2123232312.

It is a happy number.

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, 272094 + ... + 341586.

Almost surely, 2^21323232120 is an apocalyptic number.

21323232120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323232120 is an abundant number, since it is smaller than the sum of its proper divisors (42672402600).

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

21323232120 is a wasteful number, since it uses less digits than its factorization.

21323232120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72064 (or 72060 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21323232120 its reverse (2123232312), we get a palindrome (23446464432).

The spelling of 21323232120 in words is "twenty-one billion, three hundred twenty-three million, two hundred thirty-two thousand, one hundred twenty".