2123110111 has 2 divisors, whose sum is σ = 2123110112. Its totient is φ = 2123110110.

The previous prime is 2123110081. The next prime is 2123110123. The reversal of 2123110111 is 1110113212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123110111 - 2²³ = 2114721503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123110091 and 2123110100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123110511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061555055 + 1061555056.

It is an arithmetic number, because the mean of its divisors is an integer number (1061555056).

Almost surely, 2^2123110111 is an apocalyptic number.

2123110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123110111 is an equidigital number, since it uses as much as digits as its factorization.

2123110111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2123110111 is about 46077.2190024528. The cubic root of 2123110111 is about 1285.2595499878.

Adding to 2123110111 its reverse (1110113212), we get a palindrome (3233223323).

The spelling of 2123110111 in words is "two billion, one hundred twenty-three million, one hundred ten thousand, one hundred eleven".