121536344799 has 24 divisors (see below), whose sum is σ = 176617802400. Its totient is φ = 80533398528.

The previous prime is 121536344729. The next prime is 121536344803. The reversal of 121536344799 is 997443635121.

121536344799 is a `hidden beast` number, since 1 + 2 + 1 + 53 + 63 + 447 + 99 = 666.

It is not a de Polignac number, because 121536344799 - 2⁸ = 121536344543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121536344729) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1715079 + ... + 1784535.

It is an arithmetic number, because the mean of its divisors is an integer number (7359075100).

Almost surely, 2^121536344799 is an apocalyptic number.

121536344799 is a deficient number, since it is larger than the sum of its proper divisors (55081457601).

121536344799 is a wasteful number, since it uses less digits than its factorization.

121536344799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70639 (or 70636 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The spelling of 121536344799 in words is "one hundred twenty-one billion, five hundred thirty-six million, three hundred forty-four thousand, seven hundred ninety-nine".