12143242431 has 12 divisors (see below), whose sum is σ = 17544761208. Its totient is φ = 8093407824.

The previous prime is 12143242421. The next prime is 12143242453. The reversal of 12143242431 is 13424234121.

It is not a de Polignac number, because 12143242431 - 2¹³ = 12143234239 is a prime.

It is a super-2 number, since 2×12143242431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12143242395 and 12143242404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143242421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136660 + ... + 207273.

It is an arithmetic number, because the mean of its divisors is an integer number (1462063434).

Almost surely, 2^12143242431 is an apocalyptic number.

12143242431 is a deficient number, since it is larger than the sum of its proper divisors (5401518777).

12143242431 is a wasteful number, since it uses less digits than its factorization.

12143242431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347862 (or 347859 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 12143242431 its reverse (13424234121), we get a palindrome (25567476552).

The spelling of 12143242431 in words is "twelve billion, one hundred forty-three million, two hundred forty-two thousand, four hundred thirty-one".