121591424160 has 192 divisors, whose sum is σ = 447968707200. Its totient is φ = 30717812736.

The previous prime is 121591424117. The next prime is 121591424161. The reversal of 121591424160 is 61424195121.

121591424160 is a `hidden beast` number, since 1 + 2 + 1 + 591 + 4 + 2 + 4 + 1 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121591424161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658609 + ... + 822768.

It is an arithmetic number, because the mean of its divisors is an integer number (2333170350).

Almost surely, 2^121591424160 is an apocalyptic number.

121591424160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121591424160 is an abundant number, since it is smaller than the sum of its proper divisors (326377283040).

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

121591424160 is a wasteful number, since it uses less digits than its factorization.

121591424160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481420 (or 1481406 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 121591424160 in words is "one hundred twenty-one billion, five hundred ninety-one million, four hundred twenty-four thousand, one hundred sixty".