121601587999328 has 48 divisors (see below), whose sum is σ = 252729525625920. Its totient is φ = 57434755706496.

The previous prime is 121601587999289. The next prime is 121601587999379. The reversal of 121601587999328 is 823999785106121.

It is a super-2 number, since 2×121601587999328² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287977226 + ... + 288399177.

It is an arithmetic number, because the mean of its divisors is an integer number (5265198450540).

Almost surely, 2^{121601587999328} is an apocalyptic number.

It is an amenable number.

121601587999328 is an abundant number, since it is smaller than the sum of its proper divisors (131127937626592).

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

121601587999328 is a wasteful number, since it uses less digits than its factorization.

121601587999328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576376779 (or 576376771 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 71.

The spelling of 121601587999328 in words is "one hundred twenty-one trillion, six hundred one billion, five hundred eighty-seven million, nine hundred ninety-nine thousand, three hundred twenty-eight".