121988650474899 has 24 divisors (see below), whose sum is σ = 195695139493680. Its totient is φ = 75069938750976.

The previous prime is 121988650474877. The next prime is 121988650474909. The reversal of 121988650474899 is 998474056889121.

121988650474899 is a `hidden beast` number, since 1 + 2 + 1 + 9 + 8 + 8 + 6 + 50 + 474 + 8 + 99 = 666.

It is not a de Polignac number, because 121988650474899 - 2⁹ = 121988650474387 is a prime.

It is a super-3 number, since 3×121988650474899³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121988650476899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13367149774 + ... + 13367158899.

It is an arithmetic number, because the mean of its divisors is an integer number (8153964145570).

Almost surely, 2^{121988650474899} is an apocalyptic number.

121988650474899 is a deficient number, since it is larger than the sum of its proper divisors (73706489018781).

121988650474899 is a wasteful number, since it uses less digits than its factorization.

121988650474899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26734308708 (or 26734308689 counting only the distinct ones).

The product of its (nonzero) digits is 2508226560, while the sum is 81.

The spelling of 121988650474899 in words is "one hundred twenty-one trillion, nine hundred eighty-eight billion, six hundred fifty million, four hundred seventy-four thousand, eight hundred ninety-nine".