12321443005 has 16 divisors (see below), whose sum is σ = 16195327920. Its totient is φ = 8957412352.

The previous prime is 12321442997. The next prime is 12321443059. The reversal of 12321443005 is 50034412321.

It can be written as a sum of positive squares in 8 ways, for example, as 878648164 + 11442794841 = 29642^2 + 106971^2 .

It is not a de Polignac number, because 12321443005 - 2³ = 12321442997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2496814 + ... + 2501743.

It is an arithmetic number, because the mean of its divisors is an integer number (1012207995).

Almost surely, 2^12321443005 is an apocalyptic number.

It is an amenable number.

12321443005 is a deficient number, since it is larger than the sum of its proper divisors (3873884915).

12321443005 is a wasteful number, since it uses less digits than its factorization.

12321443005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998608.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 12321443005 its reverse (50034412321), we get a palindrome (62355855326).

The spelling of 12321443005 in words is "twelve billion, three hundred twenty-one million, four hundred forty-three thousand, five".