121897840184 has 16 divisors (see below), whose sum is σ = 230303173320. Its totient is φ = 60483660640.

The previous prime is 121897840159. The next prime is 121897840201. The reversal of 121897840184 is 481048798121.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 58156319 + ... + 58158414.

Almost surely, 2^121897840184 is an apocalyptic number.

It is an amenable number.

121897840184 is a deficient number, since it is larger than the sum of its proper divisors (108405333136).

121897840184 is a wasteful number, since it uses less digits than its factorization.

121897840184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116314870 (or 116314866 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 53.

The spelling of 121897840184 in words is "one hundred twenty-one billion, eight hundred ninety-seven million, eight hundred forty thousand, one hundred eighty-four".