122017665779 has 2 divisors, whose sum is σ = 122017665780. Its totient is φ = 122017665778.

The previous prime is 122017665751. The next prime is 122017665811. The reversal of 122017665779 is 977566710221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122017665779 - 2¹² = 122017661683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122017665779.

It is not a weakly prime, because it can be changed into another prime (122017664779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61008832889 + 61008832890.

It is an arithmetic number, because the mean of its divisors is an integer number (61008832890).

Almost surely, 2^122017665779 is an apocalyptic number.

122017665779 is a deficient number, since it is larger than the sum of its proper divisors (1).

122017665779 is an equidigital number, since it uses as much as digits as its factorization.

122017665779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 122017665779 in words is "one hundred twenty-two billion, seventeen million, six hundred sixty-five thousand, seven hundred seventy-nine".