12123323243 has 2 divisors, whose sum is σ = 12123323244. Its totient is φ = 12123323242.

The previous prime is 12123323213. The next prime is 12123323287. The reversal of 12123323243 is 34232332121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12123323243 - 2¹² = 12123319147 is a prime.

It is not a weakly prime, because it can be changed into another prime (12123323213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061661621 + 6061661622.

It is an arithmetic number, because the mean of its divisors is an integer number (6061661622).

Almost surely, 2^12123323243 is an apocalyptic number.

12123323243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123323243 is an equidigital number, since it uses as much as digits as its factorization.

12123323243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 26.

Adding to 12123323243 its reverse (34232332121), we get a palindrome (46355655364).

The spelling of 12123323243 in words is "twelve billion, one hundred twenty-three million, three hundred twenty-three thousand, two hundred forty-three".