12440233213 has 4 divisors (see below), whose sum is σ = 12440489760. Its totient is φ = 12439976668.

The previous prime is 12440233181. The next prime is 12440233217. The reversal of 12440233213 is 31233204421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12440233213 - 2⁵ = 12440233181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440233217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30895 + ... + 160732.

It is an arithmetic number, because the mean of its divisors is an integer number (3110122440).

Almost surely, 2^12440233213 is an apocalyptic number.

It is an amenable number.

12440233213 is a deficient number, since it is larger than the sum of its proper divisors (256547).

12440233213 is an equidigital number, since it uses as much as digits as its factorization.

12440233213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256546.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 12440233213 its reverse (31233204421), we get a palindrome (43673437634).

The spelling of 12440233213 in words is "twelve billion, four hundred forty million, two hundred thirty-three thousand, two hundred thirteen".