121012056 has 96 divisors (see below), whose sum is σ = 370843200. Its totient is φ = 36663840.

The previous prime is 121012051. The next prime is 121012063. The reversal of 121012056 is 650210121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012051) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 18555 + ... + 24213.

It is an arithmetic number, because the mean of its divisors is an integer number (3862950).

Almost surely, 2^121012056 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 121012056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185421600).

121012056 is an abundant number, since it is smaller than the sum of its proper divisors (249831144).

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

121012056 is a wasteful number, since it uses less digits than its factorization.

121012056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691 (or 5675 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 121012056 is about 11000.5479863505. The cubic root of 121012056 is about 494.6251707849.

Adding to 121012056 its reverse (650210121), we get a palindrome (771222177).

The spelling of 121012056 in words is "one hundred twenty-one million, twelve thousand, fifty-six".