12321210005 has 8 divisors (see below), whose sum is σ = 15922794552. Its totient is φ = 9098739648.

The previous prime is 12321209993. The next prime is 12321210007. The reversal of 12321210005 is 50001212321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1174707076 + 11146502929 = 34274^2 + 105577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12321210005 - 2²² = 12317015701 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 (12321210007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94778474 + ... + 94778603.

It is an arithmetic number, because the mean of its divisors is an integer number (1990349319).

Almost surely, 2^12321210005 is an apocalyptic number.

It is an amenable number.

12321210005 is a deficient number, since it is larger than the sum of its proper divisors (3601584547).

12321210005 is a wasteful number, since it uses less digits than its factorization.

12321210005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189557095.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 12321210005 its reverse (50001212321), we get a palindrome (62322422326).

The spelling of 12321210005 in words is "twelve billion, three hundred twenty-one million, two hundred ten thousand, five".