121894865184 has 48 divisors (see below), whose sum is σ = 320018580000. Its totient is φ = 40625963520.

The previous prime is 121894865167. The next prime is 121894865207. The reversal of 121894865184 is 481568498121.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635244 + ... + 804564.

It is an arithmetic number, because the mean of its divisors is an integer number (6667053750).

Almost surely, 2^121894865184 is an apocalyptic number.

It is an amenable number.

121894865184 is an abundant number, since it is smaller than the sum of its proper divisors (198123714816).

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

121894865184 is a wasteful number, since it uses less digits than its factorization.

121894865184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176833 (or 176825 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 57.

The spelling of 121894865184 in words is "one hundred twenty-one billion, eight hundred ninety-four million, eight hundred sixty-five thousand, one hundred eighty-four".