21100012092 has 18 divisors (see below), whose sum is σ = 53336141768. Its totient is φ = 7033337352.

The previous prime is 21100012039. The next prime is 21100012093. The reversal of 21100012092 is 29021000112.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100012093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293055688 + ... + 293055759.

Almost surely, 2^21100012092 is an apocalyptic number.

It is an amenable number.

21100012092 is an abundant number, since it is smaller than the sum of its proper divisors (32236129676).

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

21100012092 is a wasteful number, since it uses less digits than its factorization.

21100012092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586111457 (or 586111452 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 21100012092 in words is "twenty-one billion, one hundred million, twelve thousand, ninety-two".