121915161597796 has 432 divisors, whose sum is σ = 280328180227200. Its totient is φ = 46061751859200.

The previous prime is 121915161597721. The next prime is 121915161597811. The reversal of 121915161597796 is 697795161519121.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 23576706291 + ... + 23576711461.

It is an arithmetic number, because the mean of its divisors is an integer number (648907824600).

Almost surely, 2^{121915161597796} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121915161597796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140164090113600).

121915161597796 is an abundant number, since it is smaller than the sum of its proper divisors (158413018629404).

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

121915161597796 is a wasteful number, since it uses less digits than its factorization.

121915161597796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5504 (or 5464 counting only the distinct ones).

The product of its digits is 64297800, while the sum is 70.

The spelling of 121915161597796 in words is "one hundred twenty-one trillion, nine hundred fifteen billion, one hundred sixty-one million, five hundred ninety-seven thousand, seven hundred ninety-six".