12222197 has 4 divisors (see below), whose sum is σ = 13162380. Its totient is φ = 11282016.

The previous prime is 12222151. The next prime is 12222211. The reversal of 12222197 is 79122221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79122221 = 97 ⋅815693.

It can be written as a sum of positive squares in 2 ways, for example, as 1522756 + 10699441 = 1234^2 + 3271^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222197 - 2¹⁰ = 12221173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222127) 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 3 ways as a sum of consecutive naturals, for example, 470072 + ... + 470097.

It is an arithmetic number, because the mean of its divisors is an integer number (3290595).

Almost surely, 2^12222197 is an apocalyptic number.

It is an amenable number.

12222197 is a deficient number, since it is larger than the sum of its proper divisors (940183).

12222197 is an equidigital number, since it uses as much as digits as its factorization.

12222197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940182.

The product of its digits is 1008, while the sum is 26.

The square root of 12222197 is about 3496.0258866318. The cubic root of 12222197 is about 230.3472825491.

The spelling of 12222197 in words is "twelve million, two hundred twenty-two thousand, one hundred ninety-seven".