12212717 has 4 divisors (see below), whose sum is σ = 13322976. Its totient is φ = 11102460.

The previous prime is 12212713. The next prime is 12212719. The reversal of 12212717 is 71721221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12212717 - 2² = 12212713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212692 and 12212701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212713) 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, 555113 + ... + 555134.

It is an arithmetic number, because the mean of its divisors is an integer number (3330744).

Almost surely, 2^12212717 is an apocalyptic number.

It is an amenable number.

12212717 is a deficient number, since it is larger than the sum of its proper divisors (1110259).

12212717 is a wasteful number, since it uses less digits than its factorization.

12212717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110258.

The product of its digits is 392, while the sum is 23.

The square root of 12212717 is about 3494.6697984216. The cubic root of 12212717 is about 230.2877117789.

Adding to 12212717 its reverse (71721221), we get a palindrome (83933938).

The spelling of 12212717 in words is "twelve million, two hundred twelve thousand, seven hundred seventeen".