121717361928 has 16 divisors (see below), whose sum is σ = 304293404880. Its totient is φ = 40572453968.

The previous prime is 121717361921. The next prime is 121717361963. The reversal of 121717361928 is 829163717121.

121717361928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (121717361921) 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, 2535778350 + ... + 2535778397.

It is an arithmetic number, because the mean of its divisors is an integer number (19018337805).

Almost surely, 2^121717361928 is an apocalyptic number.

It is an amenable number.

121717361928 is an abundant number, since it is smaller than the sum of its proper divisors (182576042952).

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

121717361928 is a wasteful number, since it uses less digits than its factorization.

121717361928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071556756 (or 5071556752 counting only the distinct ones).

The product of its digits is 254016, while the sum is 48.

The spelling of 121717361928 in words is "one hundred twenty-one billion, seven hundred seventeen million, three hundred sixty-one thousand, nine hundred twenty-eight".