21112621112 has 96 divisors (see below), whose sum is σ = 44367523200. Its totient is φ = 9409899840.

The previous prime is 21112621111. The next prime is 21112621163.

21112621112 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112621111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10667339 + ... + 10669317.

It is an arithmetic number, because the mean of its divisors is an integer number (462161700).

Almost surely, 2^21112621112 is an apocalyptic number.

21112621112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112621112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22183761600).

21112621112 is an abundant number, since it is smaller than the sum of its proper divisors (23254902088).

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

21112621112 is a wasteful number, since it uses less digits than its factorization.

21112621112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2202 counting only the distinct ones).

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

The spelling of 21112621112 in words is "twenty-one billion, one hundred twelve million, six hundred twenty-one thousand, one hundred twelve".