21112112022 has 64 divisors (see below), whose sum is σ = 44987927040. Its totient is φ = 6590985984.

The previous prime is 21112111987. The next prime is 21112112039. The reversal of 21112112022 is 22021121112.

It is a junction number, because it is equal to n+sod(n) for n = 21112111992 and 21112112010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1392748 + ... + 1407824.

It is an arithmetic number, because the mean of its divisors is an integer number (702936360).

Almost surely, 2^21112112022 is an apocalyptic number.

21112112022 is an abundant number, since it is smaller than the sum of its proper divisors (23875815018).

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

21112112022 is a wasteful number, since it uses less digits than its factorization.

21112112022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15317.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112112022 its reverse (22021121112), we get a palindrome (43133233134).

The spelling of 21112112022 in words is "twenty-one billion, one hundred twelve million, one hundred twelve thousand, twenty-two".