12221201 has 4 divisors (see below), whose sum is σ = 12428400. Its totient is φ = 12014004.

The previous prime is 12221197. The next prime is 12221203. The reversal of 12221201 is 10212221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10212221 = 1723 ⋅5927.

It is a cyclic number.

It is not a de Polignac number, because 12221201 - 2² = 12221197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12221203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103511 + ... + 103628.

It is an arithmetic number, because the mean of its divisors is an integer number (3107100).

Almost surely, 2^12221201 is an apocalyptic number.

It is an amenable number.

12221201 is a deficient number, since it is larger than the sum of its proper divisors (207199).

12221201 is an equidigital number, since it uses as much as digits as its factorization.

12221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207198.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12221201 is about 3495.8834362719. The cubic root of 12221201 is about 230.3410252964.

Adding to 12221201 its reverse (10212221), we get a palindrome (22433422).

The spelling of 12221201 in words is "twelve million, two hundred twenty-one thousand, two hundred one".