21020113332120 has 64 divisors (see below), whose sum is σ = 72068959998720. Its totient is φ = 4804597332864.

The previous prime is 21020113332109. The next prime is 21020113332133. The reversal of 21020113332120 is 2123331102012.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 12511971382 + ... + 12511973061.

It is an arithmetic number, because the mean of its divisors is an integer number (1126077499980).

Almost surely, 2^{21020113332120} is an apocalyptic number.

21020113332120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020113332120 is an abundant number, since it is smaller than the sum of its proper divisors (51048846666600).

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

21020113332120 is a wasteful number, since it uses less digits than its factorization.

21020113332120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25023944464 (or 25023944460 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21020113332120 its reverse (2123331102012), we get a palindrome (23143444434132).

The spelling of 21020113332120 in words is "twenty-one trillion, twenty billion, one hundred thirteen million, three hundred thirty-two thousand, one hundred twenty".