121384878 has 16 divisors (see below), whose sum is σ = 243170640. Its totient is φ = 40394816.

The previous prime is 121384853. The next prime is 121384891. The reversal of 121384878 is 878483121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12693 + ... + 20096.

It is an arithmetic number, because the mean of its divisors is an integer number (15198165).

Almost surely, 2^121384878 is an apocalyptic number.

121384878 is an abundant number, since it is smaller than the sum of its proper divisors (121785762).

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

121384878 is a wasteful number, since it uses less digits than its factorization.

121384878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33411.

The product of its digits is 86016, while the sum is 42.

The square root of 121384878 is about 11017.4805649931. The cubic root of 121384878 is about 495.1326080796.

The spelling of 121384878 in words is "one hundred twenty-one million, three hundred eighty-four thousand, eight hundred seventy-eight".