12312311117 has 2 divisors, whose sum is σ = 12312311118. Its totient is φ = 12312311116.

The previous prime is 12312311107. The next prime is 12312311153. The reversal of 12312311117 is 71111321321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12181757641 + 130553476 = 110371^2 + 11426^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312311117 - 2⁸ = 12312310861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12312311092 and 12312311101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12312311107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156155558 + 6156155559.

It is an arithmetic number, because the mean of its divisors is an integer number (6156155559).

Almost surely, 2^12312311117 is an apocalyptic number.

It is an amenable number.

12312311117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312311117 is an equidigital number, since it uses as much as digits as its factorization.

12312311117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 23.

Adding to 12312311117 its reverse (71111321321), we get a palindrome (83423632438).

The spelling of 12312311117 in words is "twelve billion, three hundred twelve million, three hundred eleven thousand, one hundred seventeen".