121478914138842 has 48 divisors (see below), whose sum is σ = 283451914287360. Its totient is φ = 37377980443296.

The previous prime is 121478914138831. The next prime is 121478914138847. The reversal of 121478914138842 is 248831419874121.

It is a happy number.

121478914138842 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 78 + 9 + 141 + 388 + 42 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 121478914138842.

It is not an unprimeable number, because it can be changed into a prime (121478914138847) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 68794383 + ... + 70538109.

It is an arithmetic number, because the mean of its divisors is an integer number (5905248214320).

Almost surely, 2^{121478914138842} is an apocalyptic number.

121478914138842 is an abundant number, since it is smaller than the sum of its proper divisors (161973000148518).

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

121478914138842 is a wasteful number, since it uses less digits than its factorization.

121478914138842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041467 (or 2041464 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 63.

The spelling of 121478914138842 in words is "one hundred twenty-one trillion, four hundred seventy-eight billion, nine hundred fourteen million, one hundred thirty-eight thousand, eight hundred forty-two".