12224431231 has 4 divisors (see below), whose sum is σ = 12225547872. Its totient is φ = 12223314592.

The previous prime is 12224431211. The next prime is 12224431243. The reversal of 12224431231 is 13213442221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12224431231 - 2¹⁷ = 12224300159 is a prime.

It is a super-2 number, since 2×12224431231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12224431196 and 12224431205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224431211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541735 + ... + 563848.

It is an arithmetic number, because the mean of its divisors is an integer number (3056386968).

Almost surely, 2^12224431231 is an apocalyptic number.

12224431231 is a deficient number, since it is larger than the sum of its proper divisors (1116641).

12224431231 is a wasteful number, since it uses less digits than its factorization.

12224431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116640.

The product of its digits is 2304, while the sum is 25.

Adding to 12224431231 its reverse (13213442221), we get a palindrome (25437873452).

The spelling of 12224431231 in words is "twelve billion, two hundred twenty-four million, four hundred thirty-one thousand, two hundred thirty-one".