12217123 has 4 divisors (see below), whose sum is σ = 12224160. Its totient is φ = 12210088.

The previous prime is 12217109. The next prime is 12217147. The reversal of 12217123 is 32171221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12217123 - 2¹⁷ = 12086051 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 12217123.

It is not an unprimeable number, because it can be changed into a prime (12211123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161 + ... + 5077.

It is an arithmetic number, because the mean of its divisors is an integer number (3056040).

Almost surely, 2^12217123 is an apocalyptic number.

12217123 is a deficient number, since it is larger than the sum of its proper divisors (7037).

12217123 is an equidigital number, since it uses as much as digits as its factorization.

12217123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036.

The product of its digits is 168, while the sum is 19.

The square root of 12217123 is about 3495.3001301748. The cubic root of 12217123 is about 230.3154021955.

Adding to 12217123 its reverse (32171221), we get a palindrome (44388344).

The spelling of 12217123 in words is "twelve million, two hundred seventeen thousand, one hundred twenty-three".