12321116215 has 24 divisors (see below), whose sum is σ = 15524975088. Its totient is φ = 9386340480.

The previous prime is 12321116209. The next prime is 12321116237. The reversal of 12321116215 is 51261112321.

It is not a de Polignac number, because 12321116215 - 2⁵ = 12321116183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12321116215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 590155 + ... + 610675.

It is an arithmetic number, because the mean of its divisors is an integer number (646873962).

Almost surely, 2^12321116215 is an apocalyptic number.

12321116215 is a deficient number, since it is larger than the sum of its proper divisors (3203858873).

12321116215 is a wasteful number, since it uses less digits than its factorization.

12321116215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20799 (or 20776 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

Adding to 12321116215 its reverse (51261112321), we get a palindrome (63582228536).

The spelling of 12321116215 in words is "twelve billion, three hundred twenty-one million, one hundred sixteen thousand, two hundred fifteen".