12644222233 has 2 divisors, whose sum is σ = 12644222234. Its totient is φ = 12644222232.

The previous prime is 12644222231. The next prime is 12644222237. The reversal of 12644222233 is 33222244621.

12644222233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9989602704 + 2654619529 = 99948^2 + 51523^2 .

It is a cyclic number.

It is not a de Polignac number, because 12644222233 - 2¹ = 12644222231 is a prime.

Together with 12644222231, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12644222195 and 12644222204.

It is not a weakly prime, because it can be changed into another prime (12644222231) 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, 6322111116 + 6322111117.

It is an arithmetic number, because the mean of its divisors is an integer number (6322111117).

Almost surely, 2^12644222233 is an apocalyptic number.

It is an amenable number.

12644222233 is a deficient number, since it is larger than the sum of its proper divisors (1).

12644222233 is an equidigital number, since it uses as much as digits as its factorization.

12644222233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 31.

Adding to 12644222233 its reverse (33222244621), we get a palindrome (45866466854).

The spelling of 12644222233 in words is "twelve billion, six hundred forty-four million, two hundred twenty-two thousand, two hundred thirty-three".