22212111231 has 24 divisors (see below), whose sum is σ = 32859169200. Its totient is φ = 14454086400.

The previous prime is 22212111221. The next prime is 22212111239. The reversal of 22212111231 is 13211121222.

22212111231 is a `hidden beast` number, since 2 + 221 + 211 + 1 + 231 = 666.

It is not a de Polignac number, because 22212111231 - 2⁹ = 22212110719 is a prime.

It is a super-2 number, since 2×22212111231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212111239) 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, 82506 + ... + 226343.

It is an arithmetic number, because the mean of its divisors is an integer number (1369132050).

Almost surely, 2^22212111231 is an apocalyptic number.

22212111231 is a deficient number, since it is larger than the sum of its proper divisors (10647057969).

22212111231 is a wasteful number, since it uses less digits than its factorization.

22212111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309047 (or 309044 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 22212111231 its reverse (13211121222), we get a palindrome (35423232453).

Subtracting from 22212111231 its reverse (13211121222), we obtain a palindrome (9000990009).

The spelling of 22212111231 in words is "twenty-two billion, two hundred twelve million, one hundred eleven thousand, two hundred thirty-one".