12543013013 has 4 divisors (see below), whose sum is σ = 12947626368. Its totient is φ = 12138399660.

The previous prime is 12543012997. The next prime is 12543013057. The reversal of 12543013013 is 31031034521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31031034521 = 3613 ⋅8588717.

It is a cyclic number.

It is not a de Polignac number, because 12543013013 - 2⁴ = 12543012997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12543013013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543013313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202306631 + ... + 202306692.

It is an arithmetic number, because the mean of its divisors is an integer number (3236906592).

Almost surely, 2^12543013013 is an apocalyptic number.

It is an amenable number.

12543013013 is a deficient number, since it is larger than the sum of its proper divisors (404613355).

12543013013 is an equidigital number, since it uses as much as digits as its factorization.

12543013013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404613354.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 12543013013 its reverse (31031034521), we get a palindrome (43574047534).

The spelling of 12543013013 in words is "twelve billion, five hundred forty-three million, thirteen thousand, thirteen".