21131222110112 has 48 divisors (see below), whose sum is σ = 41850050094720. Its totient is φ = 10502659805952.

The previous prime is 21131222110081. The next prime is 21131222110133. The reversal of 21131222110112 is 21101122213112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30879053 + ... + 31555955.

It is an arithmetic number, because the mean of its divisors is an integer number (871876043640).

Almost surely, 2^{21131222110112} is an apocalyptic number.

It is an amenable number.

21131222110112 is a deficient number, since it is larger than the sum of its proper divisors (20718827984608).

21131222110112 is a wasteful number, since it uses less digits than its factorization.

21131222110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682725 (or 682717 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 21131222110112 its reverse (21101122213112), we get a palindrome (42232344323224).

The spelling of 21131222110112 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred twenty-two million, one hundred ten thousand, one hundred twelve".