23123111999 has 8 divisors (see below), whose sum is σ = 25143579552. Its totient is φ = 21137182560.

The previous prime is 23123111989. The next prime is 23123112053. The reversal of 23123111999 is 99911132132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23123111999 - 2²⁸ = 22854676543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123111959) 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 in 7 ways as a sum of consecutive naturals, for example, 8633132 + ... + 8635809.

It is an arithmetic number, because the mean of its divisors is an integer number (3142947444).

Almost surely, 2^23123111999 is an apocalyptic number.

23123111999 is a deficient number, since it is larger than the sum of its proper divisors (2020467553).

23123111999 is a wasteful number, since it uses less digits than its factorization.

23123111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17269057.

The product of its digits is 26244, while the sum is 41.

The spelling of 23123111999 in words is "twenty-three billion, one hundred twenty-three million, one hundred eleven thousand, nine hundred ninety-nine".