12643227242 has 4 divisors (see below), whose sum is σ = 18964840866. Its totient is φ = 6321613620.

The previous prime is 12643227241. The next prime is 12643227257. The reversal of 12643227242 is 24272234621.

12643227242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7223470081 + 5419757161 = 84991^2 + 73619^2 .

It is not an unprimeable number, because it can be changed into a prime (12643227241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3160806809 + ... + 3160806812.

Almost surely, 2^12643227242 is an apocalyptic number.

12643227242 is a deficient number, since it is larger than the sum of its proper divisors (6321613624).

12643227242 is an equidigital number, since it uses as much as digits as its factorization.

12643227242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6321613623.

The product of its digits is 64512, while the sum is 35.

The spelling of 12643227242 in words is "twelve billion, six hundred forty-three million, two hundred twenty-seven thousand, two hundred forty-two".