12111716565679 has 2 divisors, whose sum is σ = 12111716565680. Its totient is φ = 12111716565678.

The previous prime is 12111716565653. The next prime is 12111716565713. The reversal of 12111716565679 is 97656561711121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111716565679 is a prime.

It is a super-2 number, since 2×12111716565679² (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 (12111716565079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055858282839 + 6055858282840.

It is an arithmetic number, because the mean of its divisors is an integer number (6055858282840).

Almost surely, 2^{12111716565679} is an apocalyptic number.

12111716565679 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111716565679 is an equidigital number, since it uses as much as digits as its factorization.

12111716565679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 58.

The spelling of 12111716565679 in words is "twelve trillion, one hundred eleven billion, seven hundred sixteen million, five hundred sixty-five thousand, six hundred seventy-nine".