21112120020012 has 96 divisors (see below), whose sum is σ = 56514604124160. Its totient is φ = 6008971395840.

The previous prime is 21112120019993. The next prime is 21112120020041. The reversal of 21112120020012 is 21002002121112.

It is a super-2 number, since 2×21112120020012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112120019973 and 21112120020000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25637437 + ... + 26448107.

It is an arithmetic number, because the mean of its divisors is an integer number (588693792960).

Almost surely, 2^{21112120020012} is an apocalyptic number.

It is an amenable number.

21112120020012 is an abundant number, since it is smaller than the sum of its proper divisors (35402484104148).

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

21112120020012 is a wasteful number, since it uses less digits than its factorization.

21112120020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811871 (or 811869 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112120020012 its reverse (21002002121112), we get a palindrome (42114122141124).

The spelling of 21112120020012 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, twenty thousand, twelve".