22212312231 has 16 divisors (see below), whose sum is σ = 31398053888. Its totient is φ = 13943210400.

The previous prime is 22212312191. The next prime is 22212312247. The reversal of 22212312231 is 13221321222.

It is not a de Polignac number, because 22212312231 - 2¹⁰ = 22212311207 is a prime.

It is a super-2 number, since 2×22212312231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22212312198 and 22212312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212312131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3224155 + ... + 3231036.

It is an arithmetic number, because the mean of its divisors is an integer number (1962378368).

Almost surely, 2^22212312231 is an apocalyptic number.

22212312231 is a deficient number, since it is larger than the sum of its proper divisors (9185741657).

22212312231 is a wasteful number, since it uses less digits than its factorization.

22212312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6455262.

The product of its digits is 576, while the sum is 21.

Adding to 22212312231 its reverse (13221321222), we get a palindrome (35433633453).

The spelling of 22212312231 in words is "twenty-two billion, two hundred twelve million, three hundred twelve thousand, two hundred thirty-one".