12111313231 has 2 divisors, whose sum is σ = 12111313232. Its totient is φ = 12111313230.

The previous prime is 12111313211. The next prime is 12111313237. The reversal of 12111313231 is 13231311121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111313231 - 2⁷ = 12111313103 is a prime.

It is a super-2 number, since 2×12111313231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12111313199 and 12111313208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111313237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055656615 + 6055656616.

It is an arithmetic number, because the mean of its divisors is an integer number (6055656616).

Almost surely, 2^12111313231 is an apocalyptic number.

12111313231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111313231 is an equidigital number, since it uses as much as digits as its factorization.

12111313231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 19.

Adding to 12111313231 its reverse (13231311121), we get a palindrome (25342624352).

The spelling of 12111313231 in words is "twelve billion, one hundred eleven million, three hundred thirteen thousand, two hundred thirty-one".