121117295816 has 16 divisors (see below), whose sum is σ = 247739923440. Its totient is φ = 55053316240.

The previous prime is 121117295813. The next prime is 121117295843. The reversal of 121117295816 is 618592711121.

It is a super-2 number, since 2×121117295816² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (121117295813) 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, 688166366 + ... + 688166541.

It is an arithmetic number, because the mean of its divisors is an integer number (15483745215).

Almost surely, 2^121117295816 is an apocalyptic number.

It is an amenable number.

121117295816 is an abundant number, since it is smaller than the sum of its proper divisors (126622627624).

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

121117295816 is a wasteful number, since it uses less digits than its factorization.

121117295816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376332924 (or 1376332920 counting only the distinct ones).

The product of its digits is 60480, while the sum is 44.

The spelling of 121117295816 in words is "one hundred twenty-one billion, one hundred seventeen million, two hundred ninety-five thousand, eight hundred sixteen".