12231443131 has 4 divisors (see below), whose sum is σ = 12231814552. Its totient is φ = 12231071712.

The previous prime is 12231443093. The next prime is 12231443143. The reversal of 12231443131 is 13134413221.

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

It is a cyclic number.

It is not a de Polignac number, because 12231443131 - 2²¹ = 12229345979 is a prime.

It is a super-2 number, since 2×12231443131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12231443096 and 12231443105.

It is not an unprimeable number, because it can be changed into a prime (12231243131) 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, 130926 + ... + 203971.

It is an arithmetic number, because the mean of its divisors is an integer number (3057953638).

Almost surely, 2^12231443131 is an apocalyptic number.

12231443131 is a deficient number, since it is larger than the sum of its proper divisors (371421).

12231443131 is an equidigital number, since it uses as much as digits as its factorization.

12231443131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371420.

The product of its digits is 1728, while the sum is 25.

Adding to 12231443131 its reverse (13134413221), we get a palindrome (25365856352).

The spelling of 12231443131 in words is "twelve billion, two hundred thirty-one million, four hundred forty-three thousand, one hundred thirty-one".