122119785218 has 18 divisors (see below), whose sum is σ = 184957229961. Its totient is φ = 60473022984.

The previous prime is 122119785211. The next prime is 122119785253. The reversal of 122119785218 is 812587911221.

It can be written as a sum of positive squares in 2 ways, for example, as 117180928489 + 4938856729 = 342317^2 + 70277^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=247103.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122119785211) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 53867321 + ... + 53869587.

Almost surely, 2^122119785218 is an apocalyptic number.

122119785218 is a deficient number, since it is larger than the sum of its proper divisors (62837444743).

122119785218 is an frugal number, since it uses more digits than its factorization.

122119785218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754 (or 2378 counting only the distinct ones).

The product of its digits is 161280, while the sum is 47.

The spelling of 122119785218 in words is "one hundred twenty-two billion, one hundred nineteen million, seven hundred eighty-five thousand, two hundred eighteen".