21021031330112 has 56 divisors (see below), whose sum is σ = 45520597218720. Its totient is φ = 9551897832960.

The previous prime is 21021031330073. The next prime is 21021031330139. The reversal of 21021031330112 is 21103313012012.

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 7 ways as a sum of consecutive naturals, for example, 2708687 + ... + 7027022.

Almost surely, 2^{21021031330112} is an apocalyptic number.

21021031330112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21021031330112 is an abundant number, since it is smaller than the sum of its proper divisors (24499565888608).

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

21021031330112 is a wasteful number, since it uses less digits than its factorization.

21021031330112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9738799 (or 9738789 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21021031330112 its reverse (21103313012012), we get a palindrome (42124344342124).

The spelling of 21021031330112 in words is "twenty-one trillion, twenty-one billion, thirty-one million, three hundred thirty thousand, one hundred twelve".