12213117 has 12 divisors (see below), whose sum is σ = 20161440. Its totient is φ = 6978888.

The previous prime is 12213109. The next prime is 12213127. The reversal of 12213117 is 71131221.

It is a happy number.

It is not a de Polignac number, because 12213117 - 2³ = 12213109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12213117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96867 + ... + 96992.

It is an arithmetic number, because the mean of its divisors is an integer number (1680120).

Almost surely, 2^12213117 is an apocalyptic number.

It is an amenable number.

12213117 is a deficient number, since it is larger than the sum of its proper divisors (7948323).

12213117 is a wasteful number, since it uses less digits than its factorization.

12213117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193872 (or 193869 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 12213117 is about 3494.7270279666. The cubic root of 12213117 is about 230.2902259364.

Adding to 12213117 its reverse (71131221), we get a palindrome (83344338).

The spelling of 12213117 in words is "twelve million, two hundred thirteen thousand, one hundred seventeen".