12311171251 has 2 divisors, whose sum is σ = 12311171252. Its totient is φ = 12311171250.

The previous prime is 12311171189. The next prime is 12311171261. The reversal of 12311171251 is 15217111321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12311171251 - 2⁷ = 12311171123 is a prime.

It is not a weakly prime, because it can be changed into another prime (12311171261) 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, 6155585625 + 6155585626.

It is an arithmetic number, because the mean of its divisors is an integer number (6155585626).

Almost surely, 2^12311171251 is an apocalyptic number.

12311171251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311171251 is an equidigital number, since it uses as much as digits as its factorization.

12311171251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 25.

Adding to 12311171251 its reverse (15217111321), we get a palindrome (27528282572).

The spelling of 12311171251 in words is "twelve billion, three hundred eleven million, one hundred seventy-one thousand, two hundred fifty-one".