12440442233 has 2 divisors, whose sum is σ = 12440442234. Its totient is φ = 12440442232.

The previous prime is 12440442211. The next prime is 12440442251. The reversal of 12440442233 is 33224404421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8485541689 + 3954900544 = 92117^2 + 62888^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440442233 - 2⁸ = 12440441977 is a prime.

It is a super-2 number, since 2×12440442233² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12440442196 and 12440442205.

It is not a weakly prime, because it can be changed into another prime (12440445233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220221116 + 6220221117.

It is an arithmetic number, because the mean of its divisors is an integer number (6220221117).

Almost surely, 2^12440442233 is an apocalyptic number.

It is an amenable number.

12440442233 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440442233 is an equidigital number, since it uses as much as digits as its factorization.

12440442233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 12440442233 its reverse (33224404421), we get a palindrome (45664846654).

The spelling of 12440442233 in words is "twelve billion, four hundred forty million, four hundred forty-two thousand, two hundred thirty-three".