12131240243 has 8 divisors (see below), whose sum is σ = 12279472128. Its totient is φ = 11983057864.

The previous prime is 12131240227. The next prime is 12131240257. The reversal of 12131240243 is 34204213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131240243 - 2⁴ = 12131240227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131240203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813230 + ... + 828012.

It is an arithmetic number, because the mean of its divisors is an integer number (1534934016).

Almost surely, 2^12131240243 is an apocalyptic number.

12131240243 is a deficient number, since it is larger than the sum of its proper divisors (148231885).

12131240243 is an equidigital number, since it uses as much as digits as its factorization.

12131240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24753.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12131240243 its reverse (34204213121), we get a palindrome (46335453364).

The spelling of 12131240243 in words is "twelve billion, one hundred thirty-one million, two hundred forty thousand, two hundred forty-three".