231123110111 has 2 divisors, whose sum is σ = 231123110112. Its totient is φ = 231123110110.

The previous prime is 231123110077. The next prime is 231123110167. The reversal of 231123110111 is 111011321132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231123110111 - 2¹⁴ = 231123093727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231123110111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231123110311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115561555055 + 115561555056.

It is an arithmetic number, because the mean of its divisors is an integer number (115561555056).

Almost surely, 2^231123110111 is an apocalyptic number.

231123110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

231123110111 is an equidigital number, since it uses as much as digits as its factorization.

231123110111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 231123110111 its reverse (111011321132), we get a palindrome (342134431243).

The spelling of 231123110111 in words is "two hundred thirty-one billion, one hundred twenty-three million, one hundred ten thousand, one hundred eleven".