121165967880 has 128 divisors (see below), whose sum is σ = 421446931200. Its totient is φ = 30906095616.

The previous prime is 121165967873. The next prime is 121165967917. The reversal of 121165967880 is 88769561121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2414089 + ... + 2463768.

It is an arithmetic number, because the mean of its divisors is an integer number (3292554150).

Almost surely, 2^121165967880 is an apocalyptic number.

121165967880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121165967880 is an abundant number, since it is smaller than the sum of its proper divisors (300280963320).

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

121165967880 is a wasteful number, since it uses less digits than its factorization.

121165967880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877900 (or 4877890 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 121165967880 in words is "one hundred twenty-one billion, one hundred sixty-five million, nine hundred sixty-seven thousand, eight hundred eighty".