12217326623 has 4 divisors (see below), whose sum is σ = 12417610728. Its totient is φ = 12017042520.

The previous prime is 12217326613. The next prime is 12217326643. The reversal of 12217326623 is 32662371221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32662371221 = 379 ⋅86180399.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12217326623 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 (12217326613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100141961 + ... + 100142082.

It is an arithmetic number, because the mean of its divisors is an integer number (3104402682).

Almost surely, 2^12217326623 is an apocalyptic number.

12217326623 is a deficient number, since it is larger than the sum of its proper divisors (200284105).

12217326623 is an equidigital number, since it uses as much as digits as its factorization.

12217326623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200284104.

The product of its digits is 36288, while the sum is 35.

Adding to 12217326623 its reverse (32662371221), we get a palindrome (44879697844).

The spelling of 12217326623 in words is "twelve billion, two hundred seventeen million, three hundred twenty-six thousand, six hundred twenty-three".