122102779 has 2 divisors, whose sum is σ = 122102780. Its totient is φ = 122102778.

The previous prime is 122102777. The next prime is 122102807. The reversal of 122102779 is 977201221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122102779 - 2¹ = 122102777 is a prime.

Together with 122102777, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 122102779.

It is not a weakly prime, because it can be changed into another prime (122102777) 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, 61051389 + 61051390.

It is an arithmetic number, because the mean of its divisors is an integer number (61051390).

Almost surely, 2^122102779 is an apocalyptic number.

122102779 is a deficient number, since it is larger than the sum of its proper divisors (1).

122102779 is an equidigital number, since it uses as much as digits as its factorization.

122102779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 122102779 is about 11050.0126244272. The cubic root of 122102779 is about 496.1068033857.

The spelling of 122102779 in words is "one hundred twenty-two million, one hundred two thousand, seven hundred seventy-nine".