12131444432 has 20 divisors (see below), whose sum is σ = 23560783680. Its totient is φ = 6051242208.

The previous prime is 12131444431. The next prime is 12131444447. The reversal of 12131444432 is 23444413121.

It is a junction number, because it is equal to n+sod(n) for n = 12131444395 and 12131444404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131444431) 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, 898088 + ... + 911495.

It is an arithmetic number, because the mean of its divisors is an integer number (1178039184).

Almost surely, 2^12131444432 is an apocalyptic number.

It is an amenable number.

12131444432 is a deficient number, since it is larger than the sum of its proper divisors (11429339248).

12131444432 is a wasteful number, since it uses less digits than its factorization.

12131444432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810010 (or 1810004 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

Adding to 12131444432 its reverse (23444413121), we get a palindrome (35575857553).

The spelling of 12131444432 in words is "twelve billion, one hundred thirty-one million, four hundred forty-four thousand, four hundred thirty-two".