12213431231 has 8 divisors (see below), whose sum is σ = 12435292800. Its totient is φ = 11992064920.

The previous prime is 12213431207. The next prime is 12213431257. The reversal of 12213431231 is 13213431221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12213431231 is a prime.

It is a super-2 number, since 2×12213431231² (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 = 12213431197 and 12213431206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213430231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73865 + ... + 172866.

It is an arithmetic number, because the mean of its divisors is an integer number (1554411600).

Almost surely, 2^12213431231 is an apocalyptic number.

12213431231 is a deficient number, since it is larger than the sum of its proper divisors (221861569).

12213431231 is an equidigital number, since it uses as much as digits as its factorization.

12213431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247629.

The product of its digits is 864, while the sum is 23.

Adding to 12213431231 its reverse (13213431221), we get a palindrome (25426862452).

The spelling of 12213431231 in words is "twelve billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred thirty-one".