21031130331120 has 320 divisors, whose sum is σ = 82198972929024. Its totient is φ = 4329109463040.

The previous prime is 21031130331089. The next prime is 21031130331179. The reversal of 21031130331120 is 2113303113012.

It is a happy number.

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 63 ways as a sum of consecutive naturals, for example, 10848022 + ... + 12638901.

Almost surely, 2^{21031130331120} is an apocalyptic number.

21031130331120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031130331120 is an abundant number, since it is smaller than the sum of its proper divisors (61167842597904).

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

21031130331120 is a wasteful number, since it uses less digits than its factorization.

21031130331120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23487000 (or 23486994 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21031130331120 its reverse (2113303113012), we get a palindrome (23144433444132).

The spelling of 21031130331120 in words is "twenty-one trillion, thirty-one billion, one hundred thirty million, three hundred thirty-one thousand, one hundred twenty".