12111123023 has 4 divisors (see below), whose sum is σ = 12128400648. Its totient is φ = 12093845400.

The previous prime is 12111122993. The next prime is 12111123053. The reversal of 12111123023 is 32032111121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12111122993) and next prime (12111123053).

It is a cyclic number.

It is not a de Polignac number, because 12111123023 - 2¹⁶ = 12111057487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111122992 and 12111123010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111123053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8637761 + ... + 8639162.

It is an arithmetic number, because the mean of its divisors is an integer number (3032100162).

Almost surely, 2^12111123023 is an apocalyptic number.

12111123023 is a deficient number, since it is larger than the sum of its proper divisors (17277625).

12111123023 is an equidigital number, since it uses as much as digits as its factorization.

12111123023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17277624.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12111123023 its reverse (32032111121), we get a palindrome (44143234144).

The spelling of 12111123023 in words is "twelve billion, one hundred eleven million, one hundred twenty-three thousand, twenty-three".