12222222231 has 16 divisors (see below), whose sum is σ = 17143977600. Its totient is φ = 7733832288.

The previous prime is 12222222197. The next prime is 12222222253. The reversal of 12222222231 is 13222222221.

It is not a de Polignac number, because 12222222231 - 2⁹ = 12222221719 is a prime.

It is a super-2 number, since 2×12222222231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12222222198 and 12222222207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222222281) 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, 1185421 + ... + 1195686.

It is an arithmetic number, because the mean of its divisors is an integer number (1071498600).

Almost surely, 2^12222222231 is an apocalyptic number.

12222222231 is a deficient number, since it is larger than the sum of its proper divisors (4921755369).

12222222231 is a wasteful number, since it uses less digits than its factorization.

12222222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381198.

The product of its digits is 768, while the sum is 21.

Adding to 12222222231 its reverse (13222222221), we get a palindrome (25444444452).

It can be divided in two parts, 12222222 and 231, that multiplied together give a palindrome (2823333282).

The spelling of 12222222231 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred thirty-one".