12443212123 has 2 divisors, whose sum is σ = 12443212124. Its totient is φ = 12443212122.

The previous prime is 12443212097. The next prime is 12443212151. The reversal of 12443212123 is 32121234421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12443212123 - 2⁹ = 12443211611 is a prime.

It is not a weakly prime, because it can be changed into another prime (12443212183) 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 as a sum of consecutive naturals, namely, 6221606061 + 6221606062.

It is an arithmetic number, because the mean of its divisors is an integer number (6221606062).

Almost surely, 2^12443212123 is an apocalyptic number.

12443212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443212123 is an equidigital number, since it uses as much as digits as its factorization.

12443212123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

Adding to 12443212123 its reverse (32121234421), we get a palindrome (44564446544).

The spelling of 12443212123 in words is "twelve billion, four hundred forty-three million, two hundred twelve thousand, one hundred twenty-three".