12221219 has 4 divisors (see below), whose sum is σ = 12335544. Its totient is φ = 12106896.

The previous prime is 12221207. The next prime is 12221233. The reversal of 12221219 is 91212221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91212221 = 29 ⋅3145249.

It is a cyclic number.

It is not a de Polignac number, because 12221219 - 2⁴ = 12221203 is a prime.

It is a super-2 number, since 2×12221219² = 298716387691922, which contains 22 as substring.

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 12221219.

It is not an unprimeable number, because it can be changed into a prime (12221519) 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, 57002 + ... + 57215.

It is an arithmetic number, because the mean of its divisors is an integer number (3083886).

Almost surely, 2^12221219 is an apocalyptic number.

12221219 is a deficient number, since it is larger than the sum of its proper divisors (114325).

12221219 is a wasteful number, since it uses less digits than its factorization.

12221219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114324.

The product of its digits is 144, while the sum is 20.

The square root of 12221219 is about 3495.8860107275. The cubic root of 12221219 is about 230.3411383823.

The spelling of 12221219 in words is "twelve million, two hundred twenty-one thousand, two hundred nineteen".