21122322112 has 56 divisors (see below), whose sum is σ = 44590990320. Its totient is φ = 9892700160.

The previous prime is 21122322107. The next prime is 21122322121.

21122322112 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 21122322112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183564 + ... + 275572.

Almost surely, 2^21122322112 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 21122322112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22295495160).

21122322112 is an abundant number, since it is smaller than the sum of its proper divisors (23468668208).

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

21122322112 is a wasteful number, since it uses less digits than its factorization.

21122322112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92249 (or 92239 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

Multiplying 21122322112 by its product of digits (192), we get a palindrome (4055485845504).

The spelling of 21122322112 in words is "twenty-one billion, one hundred twenty-two million, three hundred twenty-two thousand, one hundred twelve".