12212585611817 has 2 divisors, whose sum is σ = 12212585611818. Its totient is φ = 12212585611816.

The previous prime is 12212585611771. The next prime is 12212585611843. The reversal of 12212585611817 is 71811658521221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12212585611801 + 16 = 3494651^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212585611817 - 2³⁸ = 11937707704873 is a prime.

It is not a weakly prime, because it can be changed into another prime (12212285611817) 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, 6106292805908 + 6106292805909.

It is an arithmetic number, because the mean of its divisors is an integer number (6106292805909).

Almost surely, 2^{12212585611817} is an apocalyptic number.

It is an amenable number.

12212585611817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212585611817 is an equidigital number, since it uses as much as digits as its factorization.

12212585611817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 537600, while the sum is 50.

The spelling of 12212585611817 in words is "twelve trillion, two hundred twelve billion, five hundred eighty-five million, six hundred eleven thousand, eight hundred seventeen".