21100112000988 has 144 divisors (see below), whose sum is σ = 53326101113376. Its totient is φ = 6487810560000.

The previous prime is 21100112000959. The next prime is 21100112001013. The reversal of 21100112000988 is 88900021100112.

It is a super-2 number, since 2×21100112000988² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26143488 + ... + 26938488.

Almost surely, 2^{21100112000988} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100112000988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26663050556688).

21100112000988 is an abundant number, since it is smaller than the sum of its proper divisors (32225989112388).

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

21100112000988 is a wasteful number, since it uses less digits than its factorization.

21100112000988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795204 (or 795179 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

The spelling of 21100112000988 in words is "twenty-one trillion, one hundred billion, one hundred twelve million, nine hundred eighty-eight", and thus it is an aban number.