12120331231 has 2 divisors, whose sum is σ = 12120331232. Its totient is φ = 12120331230.

The previous prime is 12120331217. The next prime is 12120331273. The reversal of 12120331231 is 13213302121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12120331231 - 2⁵ = 12120331199 is a prime.

It is a super-2 number, since 2×12120331231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120331199 and 12120331208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12120331331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060165615 + 6060165616.

It is an arithmetic number, because the mean of its divisors is an integer number (6060165616).

Almost surely, 2^12120331231 is an apocalyptic number.

12120331231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120331231 is an equidigital number, since it uses as much as digits as its factorization.

12120331231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12120331231 its reverse (13213302121), we get a palindrome (25333633352).

The spelling of 12120331231 in words is "twelve billion, one hundred twenty million, three hundred thirty-one thousand, two hundred thirty-one".