12311001977 has 2 divisors, whose sum is σ = 12311001978. Its totient is φ = 12311001976.

The previous prime is 12311001947. The next prime is 12311002043. The reversal of 12311001977 is 77910011321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9053332201 + 3257669776 = 95149^2 + 57076^2 .

It is a cyclic number.

It is not a de Polignac number, because 12311001977 - 2²² = 12306807673 is a prime.

It is not a weakly prime, because it can be changed into another prime (12311001907) 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, 6155500988 + 6155500989.

It is an arithmetic number, because the mean of its divisors is an integer number (6155500989).

Almost surely, 2^12311001977 is an apocalyptic number.

It is an amenable number.

12311001977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311001977 is an equidigital number, since it uses as much as digits as its factorization.

12311001977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 32.

The spelling of 12311001977 in words is "twelve billion, three hundred eleven million, one thousand, nine hundred seventy-seven".