122129664689 has 2 divisors, whose sum is σ = 122129664690. Its totient is φ = 122129664688.

The previous prime is 122129664667. The next prime is 122129664697. The reversal of 122129664689 is 986466921221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101065496464 + 21064168225 = 317908^2 + 145135^2 .

It is an emirp because it is prime and its reverse (986466921221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122129664689 is a prime.

It is not a weakly prime, because it can be changed into another prime (122129664089) 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, 61064832344 + 61064832345.

It is an arithmetic number, because the mean of its divisors is an integer number (61064832345).

Almost surely, 2^122129664689 is an apocalyptic number.

It is an amenable number.

122129664689 is a deficient number, since it is larger than the sum of its proper divisors (1).

122129664689 is an equidigital number, since it uses as much as digits as its factorization.

122129664689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 56.

The spelling of 122129664689 in words is "one hundred twenty-two billion, one hundred twenty-nine million, six hundred sixty-four thousand, six hundred eighty-nine".