56120121 has 24 divisors (see below), whose sum is σ = 84657664. Its totient is φ = 37149840.

The previous prime is 56120101. The next prime is 56120123. The reversal of 56120121 is 12102165.

56120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56120121 - 2⁷ = 56119993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56120094 and 56120103.

It is not an unprimeable number, because it can be changed into a prime (56120123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37416 + ... + 38886.

Almost surely, 2^56120121 is an apocalyptic number.

It is an amenable number.

56120121 is a deficient number, since it is larger than the sum of its proper divisors (28537543).

56120121 is a wasteful number, since it uses less digits than its factorization.

56120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 1631 counting only the distinct ones).

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

The square root of 56120121 is about 7491.3363961312. The cubic root of 56120121 is about 382.8595926328.

Adding to 56120121 its reverse (12102165), we get a palindrome (68222286).

The spelling of 56120121 in words is "fifty-six million, one hundred twenty thousand, one hundred twenty-one".