21100100020112 has 20 divisors (see below), whose sum is σ = 40883979257856. Its totient is φ = 10549395695520.

The previous prime is 21100100020099. The next prime is 21100100020249. The reversal of 21100100020112 is 21102000100112.

It is a junction number, because it is equal to n+sod(n) for n = 21100100020093 and 21100100020102.

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, 40628564 + ... + 41144627.

Almost surely, 2^{21100100020112} is an apocalyptic number.

It is an amenable number.

21100100020112 is a deficient number, since it is larger than the sum of its proper divisors (19783879237744).

21100100020112 is a wasteful number, since it uses less digits than its factorization.

21100100020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81789326 (or 81789320 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21100100020112 its reverse (21102000100112), we get a palindrome (42202100120224).

The spelling of 21100100020112 in words is "twenty-one trillion, one hundred billion, one hundred million, twenty thousand, one hundred twelve".