56444210121 has 16 divisors (see below), whose sum is σ = 81527680640. Its totient is φ = 34734894480.

The previous prime is 56444210113. The next prime is 56444210131. The reversal of 56444210121 is 12101244465.

It is not a de Polignac number, because 56444210121 - 2³ = 56444210113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56444210111) 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 15 ways as a sum of consecutive naturals, for example, 4275325 + ... + 4288506.

It is an arithmetic number, because the mean of its divisors is an integer number (5095480040).

Almost surely, 2^56444210121 is an apocalyptic number.

It is an amenable number.

56444210121 is a deficient number, since it is larger than the sum of its proper divisors (25083470519).

56444210121 is an equidigital number, since it uses as much as digits as its factorization.

56444210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8563873 (or 8563847 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 56444210121 its reverse (12101244465), we get a palindrome (68545454586).

The spelling of 56444210121 in words is "fifty-six billion, four hundred forty-four million, two hundred ten thousand, one hundred twenty-one".