12213243 has 12 divisors (see below), whose sum is σ = 20161648. Its totient is φ = 6978960.

The previous prime is 12213241. The next prime is 12213251. The reversal of 12213243 is 34231221.

It is not a de Polignac number, because 12213243 - 2¹ = 12213241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12213241) 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 11 ways as a sum of consecutive naturals, for example, 96868 + ... + 96993.

Almost surely, 2^12213243 is an apocalyptic number.

12213243 is a deficient number, since it is larger than the sum of its proper divisors (7948405).

12213243 is a wasteful number, since it uses less digits than its factorization.

12213243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193874 (or 193871 counting only the distinct ones).

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

The square root of 12213243 is about 3494.7450550791. The cubic root of 12213243 is about 230.2910178846.

Adding to 12213243 its reverse (34231221), we get a palindrome (46444464).

The spelling of 12213243 in words is "twelve million, two hundred thirteen thousand, two hundred forty-three".