121510056 has 32 divisors (see below), whose sum is σ = 306620640. Its totient is φ = 40123968.

The previous prime is 121510021. The next prime is 121510097. The reversal of 121510056 is 650015121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21091 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (9581895).

Almost surely, 2^121510056 is an apocalyptic number.

It is an amenable number.

121510056 is an abundant number, since it is smaller than the sum of its proper divisors (185110584).

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

121510056 is a wasteful number, since it uses less digits than its factorization.

121510056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47433 (or 47429 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 121510056 is about 11023.1599825096. The cubic root of 121510056 is about 495.3027512290.

Adding to 121510056 its reverse (650015121), we get a palindrome (771525177).

The spelling of 121510056 in words is "one hundred twenty-one million, five hundred ten thousand, fifty-six".