121137616518 has 16 divisors (see below), whose sum is σ = 246846464496. Its totient is φ = 39617333600.

The previous prime is 121137616489. The next prime is 121137616543. The reversal of 121137616518 is 815616731121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121137616518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190467633 + ... + 190468268.

It is an arithmetic number, because the mean of its divisors is an integer number (15427904031).

Almost surely, 2^121137616518 is an apocalyptic number.

121137616518 is an abundant number, since it is smaller than the sum of its proper divisors (125708847978).

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

121137616518 is a wasteful number, since it uses less digits than its factorization.

121137616518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380935959.

The product of its digits is 60480, while the sum is 42.

The spelling of 121137616518 in words is "one hundred twenty-one billion, one hundred thirty-seven million, six hundred sixteen thousand, five hundred eighteen".