2123120256 has 64 divisors (see below), whose sum is σ = 5655614400. Its totient is φ = 705689600.

The previous prime is 2123120243. The next prime is 2123120309. The reversal of 2123120256 is 6520213212.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130156 + ... + 145556.

It is an arithmetic number, because the mean of its divisors is an integer number (88368975).

Almost surely, 2^2123120256 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 2123120256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2827807200).

2123120256 is an abundant number, since it is smaller than the sum of its proper divisors (3532494144).

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

2123120256 is a wasteful number, since it uses less digits than its factorization.

2123120256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15777 (or 15765 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2123120256 is about 46077.3290892604. The cubic root of 2123120256 is about 1285.2615971320.

Adding to 2123120256 its reverse (6520213212), we get a palindrome (8643333468).

The spelling of 2123120256 in words is "two billion, one hundred twenty-three million, one hundred twenty thousand, two hundred fifty-six".