120999999999918 has 64 divisors (see below), whose sum is σ = 260853023208960. Its totient is φ = 37196835320448.

The previous prime is 120999999999887. The next prime is 120999999999941. The reversal of 120999999999918 is 819999999999021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407942055 + ... + 408238557.

It is an arithmetic number, because the mean of its divisors is an integer number (4075828487640).

Almost surely, 2^{120999999999918} is an apocalyptic number.

120999999999918 is an abundant number, since it is smaller than the sum of its proper divisors (139853023209042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120999999999918 is a wasteful number, since it uses less digits than its factorization.

120999999999918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301273.

The product of its (nonzero) digits is 55788550416, while the sum is 102.

The spelling of 120999999999918 in words is "one hundred twenty trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighteen".