22112312222 has 72 divisors (see below), whose sum is σ = 45672856488. Its totient is φ = 7952424480.

The previous prime is 22112312219. The next prime is 22112312231. The reversal of 22112312222 is 22221321122.

It is a junction number, because it is equal to n+sod(n) for n = 22112312194 and 22112312203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82433 + ... + 225875.

It is an arithmetic number, because the mean of its divisors is an integer number (634345229).

Almost surely, 2^22112312222 is an apocalyptic number.

22112312222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22112312222 is an abundant number, since it is smaller than the sum of its proper divisors (23560544266).

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

22112312222 is a wasteful number, since it uses less digits than its factorization.

22112312222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143494 (or 143476 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

Adding to 22112312222 its reverse (22221321122), we get a palindrome (44333633344).

The spelling of 22112312222 in words is "twenty-two billion, one hundred twelve million, three hundred twelve thousand, two hundred twenty-two".