12131040423 has 4 divisors (see below), whose sum is σ = 16174720568. Its totient is φ = 8087360280.

The previous prime is 12131040419. The next prime is 12131040457. The reversal of 12131040423 is 32404013121.

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

It is not a de Polignac number, because 12131040423 - 2² = 12131040419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12131040423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131040413) 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, 2021840068 + ... + 2021840073.

It is an arithmetic number, because the mean of its divisors is an integer number (4043680142).

Almost surely, 2^12131040423 is an apocalyptic number.

12131040423 is a deficient number, since it is larger than the sum of its proper divisors (4043680145).

12131040423 is an equidigital number, since it uses as much as digits as its factorization.

12131040423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043680144.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12131040423 its reverse (32404013121), we get a palindrome (44535053544).

The spelling of 12131040423 in words is "twelve billion, one hundred thirty-one million, forty thousand, four hundred twenty-three".