121255056 has 120 divisors (see below), whose sum is σ = 379142400. Its totient is φ = 37293696.

The previous prime is 121255051. The next prime is 121255073. The reversal of 121255056 is 650552121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121255051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49345 + ... + 51743.

It is an arithmetic number, because the mean of its divisors is an integer number (3159520).

Almost surely, 2^121255056 is an apocalyptic number.

121255056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121255056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189571200).

121255056 is an abundant number, since it is smaller than the sum of its proper divisors (257887344).

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

121255056 is a wasteful number, since it uses less digits than its factorization.

121255056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 121255056 is about 11011.5873515130. The cubic root of 121255056 is about 494.9560291520.

The spelling of 121255056 in words is "one hundred twenty-one million, two hundred fifty-five thousand, fifty-six".