12311030440477 has 2 divisors, whose sum is σ = 12311030440478. Its totient is φ = 12311030440476.

The previous prime is 12311030440447. The next prime is 12311030440493. The reversal of 12311030440477 is 77404403011321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9777040834276 + 2533989606201 = 3126826^2 + 1591851^2 .

It is an emirp because it is prime and its reverse (77404403011321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12311030440477 - 2¹¹ = 12311030438429 is a prime.

It is a super-2 number, since 2×12311030440477² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311030440447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155515220238 + 6155515220239.

It is an arithmetic number, because the mean of its divisors is an integer number (6155515220239).

Almost surely, 2^{12311030440477} is an apocalyptic number.

It is an amenable number.

12311030440477 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311030440477 is an equidigital number, since it uses as much as digits as its factorization.

12311030440477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

Adding to 12311030440477 its reverse (77404403011321), we get a palindrome (89715433451798).

The spelling of 12311030440477 in words is "twelve trillion, three hundred eleven billion, thirty million, four hundred forty thousand, four hundred seventy-seven".