12221417 has 8 divisors (see below), whose sum is σ = 13468224. Its totient is φ = 11018448.

The previous prime is 12221413. The next prime is 12221431. The reversal of 12221417 is 71412221.

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 12221417 - 2² = 12221413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221413) 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, 10373 + ... + 11490.

It is an arithmetic number, because the mean of its divisors is an integer number (1683528).

Almost surely, 2^12221417 is an apocalyptic number.

It is an amenable number.

12221417 is a deficient number, since it is larger than the sum of its proper divisors (1246807).

12221417 is a wasteful number, since it uses less digits than its factorization.

12221417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21919.

The product of its digits is 224, while the sum is 20.

The square root of 12221417 is about 3495.9143296139. The cubic root of 12221417 is about 230.3423823199.

Adding to 12221417 its reverse (71412221), we get a palindrome (83633638).

The spelling of 12221417 in words is "twelve million, two hundred twenty-one thousand, four hundred seventeen".