2121272256 has 56 divisors (see below), whose sum is σ = 5628792400. Its totient is φ = 705042432.

The previous prime is 2121272203. The next prime is 2121272281. The reversal of 2121272256 is 6522721212.

It is a congruent number.

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, 51180 + ... + 82836.

It is an arithmetic number, because the mean of its divisors is an integer number (100514150).

Almost surely, 2^2121272256 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 2121272256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2814396200).

2121272256 is an abundant number, since it is smaller than the sum of its proper divisors (3507520144).

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

2121272256 is a wasteful number, since it uses less digits than its factorization.

2121272256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32021 (or 32011 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 2121272256 is about 46057.2714780196. The cubic root of 2121272256 is about 1284.8885843636. Note that the first 3 decimals are identical.

Adding to 2121272256 its reverse (6522721212), we get a palindrome (8643993468).

The spelling of 2121272256 in words is "two billion, one hundred twenty-one million, two hundred seventy-two thousand, two hundred fifty-six".