121655600116 has 12 divisors (see below), whose sum is σ = 216505729440. Its totient is φ = 59796820280.

The previous prime is 121655600111. The next prime is 121655600123. The reversal of 121655600116 is 611006556121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121655600111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257744680 + ... + 257745151.

It is an arithmetic number, because the mean of its divisors is an integer number (18042144120).

Almost surely, 2^121655600116 is an apocalyptic number.

It is an amenable number.

121655600116 is a deficient number, since it is larger than the sum of its proper divisors (94850129324).

121655600116 is a wasteful number, since it uses less digits than its factorization.

121655600116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515489894 (or 515489892 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 121655600116 in words is "one hundred twenty-one billion, six hundred fifty-five million, six hundred thousand, one hundred sixteen".