2311111223 has 4 divisors (see below), whose sum is σ = 2447058960. Its totient is φ = 2175163488.

The previous prime is 2311111211. The next prime is 2311111241. The reversal of 2311111223 is 3221111132.

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

It is a cyclic number.

It is not a de Polignac number, because 2311111223 - 2¹⁰ = 2311110199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 135947719 = 2311111223 / (2 + 3 + 1 + 1 + 1 + 1 + 1 + 2 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311110223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67973843 + ... + 67973876.

It is an arithmetic number, because the mean of its divisors is an integer number (611764740).

Almost surely, 2^2311111223 is an apocalyptic number.

2311111223 is a deficient number, since it is larger than the sum of its proper divisors (135947737).

2311111223 is a wasteful number, since it uses less digits than its factorization.

2311111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135947736.

The product of its digits is 72, while the sum is 17.

The square root of 2311111223 is about 48074.0181699013. The cubic root of 2311111223 is about 1322.1283431235.

Adding to 2311111223 its reverse (3221111132), we get a palindrome (5532222355).

Subtracting 2311111223 from its reverse (3221111132), we obtain a palindrome (909999909).

The spelling of 2311111223 in words is "two billion, three hundred eleven million, one hundred eleven thousand, two hundred twenty-three".