12212223 has 4 divisors (see below), whose sum is σ = 16282968. Its totient is φ = 8141480.

The previous prime is 12212201. The next prime is 12212237. The reversal of 12212223 is 32221221.

It is a happy number.

12212223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12212223 - 2⁵ = 12212191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212293) 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, 2035368 + ... + 2035373.

It is an arithmetic number, because the mean of its divisors is an integer number (4070742).

Almost surely, 2^12212223 is an apocalyptic number.

12212223 is a deficient number, since it is larger than the sum of its proper divisors (4070745).

12212223 is an equidigital number, since it uses as much as digits as its factorization.

12212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070744.

The product of its digits is 96, while the sum is 15.

The square root of 12212223 is about 3494.5991186401. The cubic root of 12212223 is about 230.2846067188.

Adding to 12212223 its reverse (32221221), we get a palindrome (44433444).

The spelling of 12212223 in words is "twelve million, two hundred twelve thousand, two hundred twenty-three".