12212231 has 8 divisors (see below), whose sum is σ = 12977280. Its totient is φ = 11459448.

The previous prime is 12212201. The next prime is 12212237. The reversal of 12212231 is 13221221.

It is a happy number.

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 12212231 - 2¹⁴ = 12195847 is a prime.

It is a super-2 number, since 2×12212231² = 298277171994722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971 + ... + 5036.

It is an arithmetic number, because the mean of its divisors is an integer number (1622160).

Almost surely, 2^12212231 is an apocalyptic number.

12212231 is a deficient number, since it is larger than the sum of its proper divisors (765049).

12212231 is a wasteful number, since it uses less digits than its factorization.

12212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133.

The product of its digits is 48, while the sum is 14.

The square root of 12212231 is about 3494.6002632633. The cubic root of 12212231 is about 230.2846570038.

Adding to 12212231 its reverse (13221221), we get a palindrome (25433452).

The spelling of 12212231 in words is "twelve million, two hundred twelve thousand, two hundred thirty-one".