120142108778 has 16 divisors (see below), whose sum is σ = 180385276200. Its totient is φ = 60013711296.

The previous prime is 120142108741. The next prime is 120142108783. The reversal of 120142108778 is 877801241021.

It can be written as a sum of positive squares in 4 ways, for example, as 93374858329 + 26767250449 = 305573^2 + 163607^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17285648 + ... + 17292596.

Almost surely, 2^120142108778 is an apocalyptic number.

120142108778 is a deficient number, since it is larger than the sum of its proper divisors (60243167422).

120142108778 is a wasteful number, since it uses less digits than its factorization.

120142108778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13961.

The product of its (nonzero) digits is 50176, while the sum is 41.

Adding to 120142108778 its reverse (877801241021), we get a palindrome (997943349799).

The spelling of 120142108778 in words is "one hundred twenty billion, one hundred forty-two million, one hundred eight thousand, seven hundred seventy-eight".