2311113121 has 4 divisors (see below), whose sum is σ = 2320703044. Its totient is φ = 2301523200.

The previous prime is 2311113097. The next prime is 2311113151. The reversal of 2311113121 is 1213111132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 608312896 + 1702800225 = 24664^2 + 41265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311113121 - 2¹¹ = 2311111073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311113095 and 2311113104.

It is not an unprimeable number, because it can be changed into a prime (2311113151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4794600 + ... + 4795081.

It is an arithmetic number, because the mean of its divisors is an integer number (580175761).

Almost surely, 2^2311113121 is an apocalyptic number.

It is an amenable number.

2311113121 is a deficient number, since it is larger than the sum of its proper divisors (9589923).

2311113121 is an equidigital number, since it uses as much as digits as its factorization.

2311113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9589922.

The product of its digits is 36, while the sum is 16.

The square root of 2311113121 is about 48074.0379102900. The cubic root of 2311113121 is about 1322.1287050560.

Adding to 2311113121 its reverse (1213111132), we get a palindrome (3524224253).

The spelling of 2311113121 in words is "two billion, three hundred eleven million, one hundred thirteen thousand, one hundred twenty-one".