23123111112 has 96 divisors (see below), whose sum is σ = 65958204000. Its totient is φ = 7297931520.

The previous prime is 23123111059. The next prime is 23123111117. The reversal of 23123111112 is 21111132132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (23123111117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3239964 + ... + 3247092.

It is an arithmetic number, because the mean of its divisors is an integer number (687064625).

Almost surely, 2^23123111112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23123111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32979102000).

23123111112 is an abundant number, since it is smaller than the sum of its proper divisors (42835092888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23123111112 is a wasteful number, since it uses less digits than its factorization.

23123111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9531 (or 9524 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 23123111112 its reverse (21111132132), we get a palindrome (44234243244).

The spelling of 23123111112 in words is "twenty-three billion, one hundred twenty-three million, one hundred eleven thousand, one hundred twelve".