121533178968 has 48 divisors (see below), whose sum is σ = 339770184000. Its totient is φ = 39204250560.

The previous prime is 121533178967. The next prime is 121533178969. The reversal of 121533178968 is 869871335121.

121533178968 is a `hidden beast` number, since 1 + 2 + 1 + 533 + 17 + 8 + 96 + 8 = 666.

121533178968 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (121533178967) and next prime (121533178969).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121533178961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27222943 + ... + 27227406.

It is an arithmetic number, because the mean of its divisors is an integer number (7078545500).

Almost surely, 2^121533178968 is an apocalyptic number.

121533178968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121533178968 is an abundant number, since it is smaller than the sum of its proper divisors (218237005032).

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

121533178968 is a wasteful number, since it uses less digits than its factorization.

121533178968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54450392 (or 54450385 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 121533178968 in words is "one hundred twenty-one billion, five hundred thirty-three million, one hundred seventy-eight thousand, nine hundred sixty-eight".