23123312111 has 2 divisors, whose sum is σ = 23123312112. Its totient is φ = 23123312110.

The previous prime is 23123312099. The next prime is 23123312141. The reversal of 23123312111 is 11121332132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23123312111 - 2³⁴ = 5943442927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23123312141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561656055 + 11561656056.

It is an arithmetic number, because the mean of its divisors is an integer number (11561656056).

Almost surely, 2^23123312111 is an apocalyptic number.

23123312111 is a deficient number, since it is larger than the sum of its proper divisors (1).

23123312111 is an equidigital number, since it uses as much as digits as its factorization.

23123312111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

Adding to 23123312111 its reverse (11121332132), we get a palindrome (34244644243).

The spelling of 23123312111 in words is "twenty-three billion, one hundred twenty-three million, three hundred twelve thousand, one hundred eleven".