121402056 has 16 divisors (see below), whose sum is σ = 303505200. Its totient is φ = 40467344.

The previous prime is 121402051. The next prime is 121402067. The reversal of 121402056 is 650204121.

It is not an unprimeable number, because it can be changed into a prime (121402051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2529186 + ... + 2529233.

It is an arithmetic number, because the mean of its divisors is an integer number (18969075).

Almost surely, 2^121402056 is an apocalyptic number.

It is an amenable number.

121402056 is an abundant number, since it is smaller than the sum of its proper divisors (182103144).

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

121402056 is a wasteful number, since it uses less digits than its factorization.

121402056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058428 (or 5058424 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121402056 is about 11018.2601167335. The cubic root of 121402056 is about 495.1559635060.

Adding to 121402056 its reverse (650204121), we get a palindrome (771606177).

It can be divided in two parts, 12140 and 2056, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 121402056 in words is "one hundred twenty-one million, four hundred two thousand, fifty-six".