121815089316 has 36 divisors (see below), whose sum is σ = 307999927872. Its totient is φ = 40594684464.

The previous prime is 121815089257. The next prime is 121815089323. The reversal of 121815089316 is 613980518121.

121815089316 is a `hidden beast` number, since 121 + 8 + 1 + 508 + 9 + 3 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287136 + ... + 571031.

It is an arithmetic number, because the mean of its divisors is an integer number (8555553552).

Almost surely, 2^121815089316 is an apocalyptic number.

It is an amenable number.

121815089316 is an abundant number, since it is smaller than the sum of its proper divisors (186184838556).

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

121815089316 is a wasteful number, since it uses less digits than its factorization.

121815089316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862120 (or 862115 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 121815089316 in words is "one hundred twenty-one billion, eight hundred fifteen million, eighty-nine thousand, three hundred sixteen".