21100112001992 has 16 divisors (see below), whose sum is σ = 39562957248000. Its totient is φ = 10549990069200.

The previous prime is 21100112001959. The next prime is 21100112002043. The reversal of 21100112001992 is 29910021100112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6867884 + ... + 9453467.

It is an arithmetic number, because the mean of its divisors is an integer number (2472684828000).

Almost surely, 2^{21100112001992} is an apocalyptic number.

It is an amenable number.

21100112001992 is a deficient number, since it is larger than the sum of its proper divisors (18462845246008).

21100112001992 is a wasteful number, since it uses less digits than its factorization.

21100112001992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16482956 (or 16482952 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 21100112001992 in words is "twenty-one trillion, one hundred billion, one hundred twelve million, one thousand, nine hundred ninety-two".