121378056 has 64 divisors (see below), whose sum is σ = 317649600. Its totient is φ = 38608128.

The previous prime is 121378039. The next prime is 121378087. The reversal of 121378056 is 650873121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45775 + ... + 48353.

It is an arithmetic number, because the mean of its divisors is an integer number (4963275).

Almost surely, 2^121378056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121378056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158824800).

121378056 is an abundant number, since it is smaller than the sum of its proper divisors (196271544).

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

121378056 is a wasteful number, since it uses less digits than its factorization.

121378056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678 (or 2674 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 121378056 is about 11017.1709617306. The cubic root of 121378056 is about 495.1233321907.

The spelling of 121378056 in words is "one hundred twenty-one million, three hundred seventy-eight thousand, fifty-six".