21331013233212 has 48 divisors (see below), whose sum is σ = 55354360247200. Its totient is φ = 7103686314240.

The previous prime is 21331013233181. The next prime is 21331013233237. The reversal of 21331013233212 is 21233231013312.

21331013233212 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 10 + 1 + 323 + 321 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 92264989 + ... + 92495892.

Almost surely, 2^{21331013233212} is an apocalyptic number.

It is an amenable number.

21331013233212 is an abundant number, since it is smaller than the sum of its proper divisors (34023347013988).

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

21331013233212 is a wasteful number, since it uses less digits than its factorization.

21331013233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184761963 (or 184761955 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21331013233212 its reverse (21233231013312), we get a palindrome (42564244246524).

The spelling of 21331013233212 in words is "twenty-one trillion, three hundred thirty-one billion, thirteen million, two hundred thirty-three thousand, two hundred twelve".