21131122113112 has 32 divisors (see below), whose sum is σ = 43222960958400. Its totient is φ = 9605008576800.

The previous prime is 21131122113071. The next prime is 21131122113173.

21131122113112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21131122113112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 22789687 + ... + 23698777.

It is an arithmetic number, because the mean of its divisors is an integer number (1350717529950).

Almost surely, 2^{21131122113112} is an apocalyptic number.

21131122113112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21131122113112 is an abundant number, since it is smaller than the sum of its proper divisors (22091838845288).

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

21131122113112 is a wasteful number, since it uses less digits than its factorization.

21131122113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173247 (or 1173243 counting only the distinct ones).

The product of its digits is 144, while the sum is 22.

Multiplying 21131122113112 by its sum of digits (22), we get a palindrome (464884686488464).

It can be divided in two parts, 2113112 and 2113112, that added together give a palindrome (4226224).

The spelling of 21131122113112 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred twenty-two million, one hundred thirteen thousand, one hundred twelve".