122017715257 has 2 divisors, whose sum is σ = 122017715258. Its totient is φ = 122017715256.

The previous prime is 122017715221. The next prime is 122017715359. The reversal of 122017715257 is 752517710221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82862803881 + 39154911376 = 287859^2 + 197876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122017715257 is a prime.

It is not a weakly prime, because it can be changed into another prime (122017715657) 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, 61008857628 + 61008857629.

It is an arithmetic number, because the mean of its divisors is an integer number (61008857629).

Almost surely, 2^122017715257 is an apocalyptic number.

It is an amenable number.

122017715257 is a deficient number, since it is larger than the sum of its proper divisors (1).

122017715257 is an equidigital number, since it uses as much as digits as its factorization.

122017715257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68600, while the sum is 40.

The spelling of 122017715257 in words is "one hundred twenty-two billion, seventeen million, seven hundred fifteen thousand, two hundred fifty-seven".