2313221121 has 12 divisors (see below), whose sum is σ = 3348636772. Its totient is φ = 1538770176.

The previous prime is 2313221089. The next prime is 2313221129. The reversal of 2313221121 is 1211223132.

2313221121 is a `hidden beast` number, since 231 + 322 + 112 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1919754225 + 393466896 = 43815^2 + 19836^2 .

It is not a de Polignac number, because 2313221121 - 2⁵ = 2313221089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2313221094 and 2313221103.

It is not an unprimeable number, because it can be changed into a prime (2313221129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277096 + ... + 285321.

Almost surely, 2^2313221121 is an apocalyptic number.

It is an amenable number.

2313221121 is a deficient number, since it is larger than the sum of its proper divisors (1035415651).

2313221121 is a wasteful number, since it uses less digits than its factorization.

2313221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562880 (or 562877 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2313221121 is about 48095.9574288734. The cubic root of 2313221121 is about 1322.5305605292.

Adding to 2313221121 its reverse (1211223132), we get a palindrome (3524444253).

It can be divided in two parts, 23132 and 21121, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 2313221121 in words is "two billion, three hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-one".