122102209978 has 16 divisors (see below), whose sum is σ = 209353532544. Its totient is φ = 52320654000.

The previous prime is 122102209969. The next prime is 122102209979. The reversal of 122102209978 is 879902201221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (122102209979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652773 + ... + 818728.

It is an arithmetic number, because the mean of its divisors is an integer number (13084595784).

Almost surely, 2^122102209978 is an apocalyptic number.

122102209978 is a deficient number, since it is larger than the sum of its proper divisors (87251322566).

122102209978 is a wasteful number, since it uses less digits than its factorization.

122102209978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477437.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 122102209978 in words is "one hundred twenty-two billion, one hundred two million, two hundred nine thousand, nine hundred seventy-eight".