121993160520 has 256 divisors, whose sum is σ = 465995980800. Its totient is φ = 24809794560.

The previous prime is 121993160479. The next prime is 121993160563. The reversal of 121993160520 is 25061399121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 293826 + ... + 574734.

It is an arithmetic number, because the mean of its divisors is an integer number (1820296800).

Almost surely, 2^121993160520 is an apocalyptic number.

121993160520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121993160520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232997990400).

121993160520 is an abundant number, since it is smaller than the sum of its proper divisors (344002820280).

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

121993160520 is a wasteful number, since it uses less digits than its factorization.

121993160520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280988 (or 280984 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The spelling of 121993160520 in words is "one hundred twenty-one billion, nine hundred ninety-three million, one hundred sixty thousand, five hundred twenty".