12231223231 has 2 divisors, whose sum is σ = 12231223232. Its totient is φ = 12231223230.

The previous prime is 12231223217. The next prime is 12231223243. The reversal of 12231223231 is 13232213221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12231223231 is a prime.

It is a super-2 number, since 2×12231223231² (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 (12231223211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115611615 + 6115611616.

It is an arithmetic number, because the mean of its divisors is an integer number (6115611616).

Almost surely, 2^12231223231 is an apocalyptic number.

12231223231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231223231 is an equidigital number, since it uses as much as digits as its factorization.

12231223231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

Adding to 12231223231 its reverse (13232213221), we get a palindrome (25463436452).

The spelling of 12231223231 in words is "twelve billion, two hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-one".