121478914138854 has 32 divisors (see below), whose sum is σ = 246387472876800. Its totient is φ = 39921399610400.

The previous prime is 121478914138847. The next prime is 121478914138889. The reversal of 121478914138854 is 458831419874121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9232264 + ... + 18116084.

It is an arithmetic number, because the mean of its divisors is an integer number (7699608527400).

Almost surely, 2^{121478914138854} is an apocalyptic number.

121478914138854 is an abundant number, since it is smaller than the sum of its proper divisors (124908558737946).

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

121478914138854 is a wasteful number, since it uses less digits than its factorization.

121478914138854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8915996.

The product of its digits is 61931520, while the sum is 66.

The spelling of 121478914138854 in words is "one hundred twenty-one trillion, four hundred seventy-eight billion, nine hundred fourteen million, one hundred thirty-eight thousand, eight hundred fifty-four".