12131771551 has 2 divisors, whose sum is σ = 12131771552. Its totient is φ = 12131771550.

The previous prime is 12131771507. The next prime is 12131771563. The reversal of 12131771551 is 15517713121.

12131771551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12131771551 - 2⁷ = 12131771423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12131771581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065885775 + 6065885776.

It is an arithmetic number, because the mean of its divisors is an integer number (6065885776).

Almost surely, 2^12131771551 is an apocalyptic number.

12131771551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131771551 is an equidigital number, since it uses as much as digits as its factorization.

12131771551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 34.

The spelling of 12131771551 in words is "twelve billion, one hundred thirty-one million, seven hundred seventy-one thousand, five hundred fifty-one".