12131112143 has 4 divisors (see below), whose sum is σ = 12389220960. Its totient is φ = 11873003328.

The previous prime is 12131112137. The next prime is 12131112167. The reversal of 12131112143 is 34121113121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34121113121 = 19 ⋅1795848059.

It is a cyclic number.

It is not a de Polignac number, because 12131112143 - 2¹⁸ = 12130849999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131112113) 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, 129054338 + ... + 129054431.

It is an arithmetic number, because the mean of its divisors is an integer number (3097305240).

Almost surely, 2^12131112143 is an apocalyptic number.

12131112143 is a deficient number, since it is larger than the sum of its proper divisors (258108817).

12131112143 is an equidigital number, since it uses as much as digits as its factorization.

12131112143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258108816.

The product of its digits is 144, while the sum is 20.

Adding to 12131112143 its reverse (34121113121), we get a palindrome (46252225264).

The spelling of 12131112143 in words is "twelve billion, one hundred thirty-one million, one hundred twelve thousand, one hundred forty-three".