12561224167 has 2 divisors, whose sum is σ = 12561224168. Its totient is φ = 12561224166.

The previous prime is 12561224147. The next prime is 12561224173. The reversal of 12561224167 is 76142216521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12561224167 - 2²⁷ = 12427006439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12561224107) 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, 6280612083 + 6280612084.

It is an arithmetic number, because the mean of its divisors is an integer number (6280612084).

Almost surely, 2^12561224167 is an apocalyptic number.

12561224167 is a deficient number, since it is larger than the sum of its proper divisors (1).

12561224167 is an equidigital number, since it uses as much as digits as its factorization.

12561224167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The spelling of 12561224167 in words is "twelve billion, five hundred sixty-one million, two hundred twenty-four thousand, one hundred sixty-seven".