12643126213 has 4 divisors (see below), whose sum is σ = 12937152448. Its totient is φ = 12349099980.

The previous prime is 12643126207. The next prime is 12643126231. The reversal of 12643126213 is 31262134621.

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: 31262134621 = 16901 ⋅1849721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12643126213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643126283) 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, 147013053 + ... + 147013138.

It is an arithmetic number, because the mean of its divisors is an integer number (3234288112).

Almost surely, 2^12643126213 is an apocalyptic number.

It is an amenable number.

12643126213 is a deficient number, since it is larger than the sum of its proper divisors (294026235).

12643126213 is an equidigital number, since it uses as much as digits as its factorization.

12643126213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294026234.

The product of its digits is 10368, while the sum is 31.

The spelling of 12643126213 in words is "twelve billion, six hundred forty-three million, one hundred twenty-six thousand, two hundred thirteen".