21232120111320 has 128 divisors (see below), whose sum is σ = 64801298903040. Its totient is φ = 5564396252160.

The previous prime is 21232120111313. The next prime is 21232120111327. The reversal of 21232120111320 is 2311102123212.

It is an interprime number because it is at equal distance from previous prime (21232120111313) and next prime (21232120111327).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232120111327) 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, 3678109 + ... + 7482828.

It is an arithmetic number, because the mean of its divisors is an integer number (506260147680).

Almost surely, 2^{21232120111320} is an apocalyptic number.

21232120111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232120111320 is an abundant number, since it is smaller than the sum of its proper divisors (43569178791720).

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

21232120111320 is a wasteful number, since it uses less digits than its factorization.

21232120111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11161225 (or 11161221 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21232120111320 its reverse (2311102123212), we get a palindrome (23543222234532).

The spelling of 21232120111320 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, one hundred eleven thousand, three hundred twenty".