12531123443 has 2 divisors, whose sum is σ = 12531123444. Its totient is φ = 12531123442.

The previous prime is 12531123439. The next prime is 12531123463. The reversal of 12531123443 is 34432113521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12531123443 - 2² = 12531123439 is a prime.

It is not a weakly prime, because it can be changed into another prime (12531123403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6265561721 + 6265561722.

It is an arithmetic number, because the mean of its divisors is an integer number (6265561722).

Almost surely, 2^12531123443 is an apocalyptic number.

12531123443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12531123443 is an equidigital number, since it uses as much as digits as its factorization.

12531123443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

Adding to 12531123443 its reverse (34432113521), we get a palindrome (46963236964).

The spelling of 12531123443 in words is "twelve billion, five hundred thirty-one million, one hundred twenty-three thousand, four hundred forty-three".