12220243 has 4 divisors (see below), whose sum is σ = 13966000. Its totient is φ = 10474488.

The previous prime is 12220237. The next prime is 12220253. The reversal of 12220243 is 34202221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34202221 = 1471 ⋅23251.

It is a cyclic number.

It is not a de Polignac number, because 12220243 - 2¹³ = 12212051 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12220253) 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, 872868 + ... + 872881.

It is an arithmetic number, because the mean of its divisors is an integer number (3491500).

Almost surely, 2^12220243 is an apocalyptic number.

12220243 is a deficient number, since it is larger than the sum of its proper divisors (1745757).

12220243 is an equidigital number, since it uses as much as digits as its factorization.

12220243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745756.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 12220243 is about 3495.7464152882. The cubic root of 12220243 is about 230.3350064535.

Adding to 12220243 its reverse (34202221), we get a palindrome (46422464).

The spelling of 12220243 in words is "twelve million, two hundred twenty thousand, two hundred forty-three".