121220056 has 16 divisors (see below), whose sum is σ = 227404800. Its totient is φ = 60578784.

The previous prime is 121220041. The next prime is 121220069. The reversal of 121220056 is 650022121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26550 + ... + 30778.

It is an arithmetic number, because the mean of its divisors is an integer number (14212800).

Almost surely, 2^121220056 is an apocalyptic number.

It is an amenable number.

121220056 is a deficient number, since it is larger than the sum of its proper divisors (106184744).

121220056 is a wasteful number, since it uses less digits than its factorization.

121220056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818 (or 7814 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121220056 is about 11009.9980018163. The cubic root of 121220056 is about 494.9084019200.

Adding to 121220056 its reverse (650022121), we get a palindrome (771242177).

The spelling of 121220056 in words is "one hundred twenty-one million, two hundred twenty thousand, fifty-six".