121189587504 has 40 divisors (see below), whose sum is σ = 315325442880. Its totient is φ = 40105904448.

The previous prime is 121189587481. The next prime is 121189587577. The reversal of 121189587504 is 405785981121.

It is a happy number.

It is a super-2 number, since 2×121189587504² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9075282 + ... + 9088625.

It is an arithmetic number, because the mean of its divisors is an integer number (7883136072).

Almost surely, 2^121189587504 is an apocalyptic number.

It is an amenable number.

121189587504 is an abundant number, since it is smaller than the sum of its proper divisors (194135855376).

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

121189587504 is a wasteful number, since it uses less digits than its factorization.

121189587504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18164057 (or 18164051 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 51.

The spelling of 121189587504 in words is "one hundred twenty-one billion, one hundred eighty-nine million, five hundred eighty-seven thousand, five hundred four".