12312104477 has 2 divisors, whose sum is σ = 12312104478. Its totient is φ = 12312104476.

The previous prime is 12312104437. The next prime is 12312104489. The reversal of 12312104477 is 77440121321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7081054201 + 5231050276 = 84149^2 + 72326^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312104477 - 2²⁸ = 12043669021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12312104407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156052238 + 6156052239.

It is an arithmetic number, because the mean of its divisors is an integer number (6156052239).

Almost surely, 2^12312104477 is an apocalyptic number.

It is an amenable number.

12312104477 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312104477 is an equidigital number, since it uses as much as digits as its factorization.

12312104477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

Adding to 12312104477 its reverse (77440121321), we get a palindrome (89752225798).

The spelling of 12312104477 in words is "twelve billion, three hundred twelve million, one hundred four thousand, four hundred seventy-seven".