12213023231 has 2 divisors, whose sum is σ = 12213023232. Its totient is φ = 12213023230.

The previous prime is 12213023219. The next prime is 12213023267. The reversal of 12213023231 is 13232031221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12213023231 - 2³⁰ = 11139281407 is a prime.

It is a super-2 number, since 2×12213023231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12213053231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106511615 + 6106511616.

It is an arithmetic number, because the mean of its divisors is an integer number (6106511616).

Almost surely, 2^12213023231 is an apocalyptic number.

12213023231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213023231 is an equidigital number, since it uses as much as digits as its factorization.

12213023231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12213023231 its reverse (13232031221), we get a palindrome (25445054452).

The spelling of 12213023231 in words is "twelve billion, two hundred thirteen million, twenty-three thousand, two hundred thirty-one".