56999120121 has 40 divisors (see below), whose sum is σ = 86233571424. Its totient is φ = 37515078720.

The previous prime is 56999120107. The next prime is 56999120131. The reversal of 56999120121 is 12102199965.

It is not a de Polignac number, because 56999120121 - 2⁷ = 56999119993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56999120131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15440886 + ... + 15444576.

Almost surely, 2^56999120121 is an apocalyptic number.

It is an amenable number.

56999120121 is a deficient number, since it is larger than the sum of its proper divisors (29234451303).

56999120121 is a wasteful number, since it uses less digits than its factorization.

56999120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6083 (or 6074 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The spelling of 56999120121 in words is "fifty-six billion, nine hundred ninety-nine million, one hundred twenty thousand, one hundred twenty-one".