2123112311 has 2 divisors, whose sum is σ = 2123112312. Its totient is φ = 2123112310.

The previous prime is 2123112289. The next prime is 2123112349. The reversal of 2123112311 is 1132113212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123112311 - 2²⁶ = 2056003447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2123112311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123111311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061556155 + 1061556156.

It is an arithmetic number, because the mean of its divisors is an integer number (1061556156).

Almost surely, 2^2123112311 is an apocalyptic number.

2123112311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123112311 is an equidigital number, since it uses as much as digits as its factorization.

2123112311 is an evil number, because the sum of its binary digits is even.

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

The square root of 2123112311 is about 46077.2428754152. The cubic root of 2123112311 is about 1285.2599939230.

Adding to 2123112311 its reverse (1132113212), we get a palindrome (3255225523).

Subtracting from 2123112311 its reverse (1132113212), we obtain a palindrome (990999099).

The spelling of 2123112311 in words is "two billion, one hundred twenty-three million, one hundred twelve thousand, three hundred eleven".