21131233213112 has 32 divisors (see below), whose sum is σ = 43223444866800. Its totient is φ = 9605002041600.

The previous prime is 21131233213099. The next prime is 21131233213171.

21131233213112 is nontrivially palindromic in base 10.

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, 7190162 + ... + 9693342.

Almost surely, 2^{21131233213112} is an apocalyptic number.

21131233213112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21131233213112 is an abundant number, since it is smaller than the sum of its proper divisors (22092211653688).

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

21131233213112 is a wasteful number, since it uses less digits than its factorization.

21131233213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599127 (or 2599123 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

It can be divided in two parts, 2113123 and 3213112, that added together give a palindrome (5326235).

The spelling of 21131233213112 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred thirty-three million, two hundred thirteen thousand, one hundred twelve".