12221343 has 6 divisors (see below), whose sum is σ = 17653064. Its totient is φ = 8147556.

The previous prime is 12221333. The next prime is 12221353. The reversal of 12221343 is 34312221.

It is an interprime number because it is at equal distance from previous prime (12221333) and next prime (12221353).

It is not a de Polignac number, because 12221343 - 2⁴ = 12221327 is a prime.

It is a super-2 number, since 2×12221343² = 298722449447298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678955 + ... + 678972.

Almost surely, 2^12221343 is an apocalyptic number.

12221343 is a deficient number, since it is larger than the sum of its proper divisors (5431721).

12221343 is a wasteful number, since it uses less digits than its factorization.

12221343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357933 (or 1357930 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 12221343 is about 3495.9037458145. The cubic root of 12221343 is about 230.3419174155.

Adding to 12221343 its reverse (34312221), we get a palindrome (46533564).

The spelling of 12221343 in words is "twelve million, two hundred twenty-one thousand, three hundred forty-three".