12194221 has 4 divisors (see below), whose sum is σ = 13132252. Its totient is φ = 11256192.

The previous prime is 12194207. The next prime is 12194227. The reversal of 12194221 is 12249121.

12194221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2340900 + 9853321 = 1530^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 12194221 - 2⁷ = 12194093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12194192 and 12194201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12194227) 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, 468996 + ... + 469021.

It is an arithmetic number, because the mean of its divisors is an integer number (3283063).

Almost surely, 2^12194221 is an apocalyptic number.

It is an amenable number.

12194221 is a deficient number, since it is larger than the sum of its proper divisors (938031).

12194221 is an equidigital number, since it uses as much as digits as its factorization.

12194221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938030.

The product of its digits is 288, while the sum is 22.

The square root of 12194221 is about 3492.0224798818. The cubic root of 12194221 is about 230.1713971320.

Multiplying 12194221 by its sum of digits (22), we get a palindrome (268272862).

The spelling of 12194221 in words is "twelve million, one hundred ninety-four thousand, two hundred twenty-one".