11220197 has 2 divisors, whose sum is σ = 11220198. Its totient is φ = 11220196.

The previous prime is 11220193. The next prime is 11220199. The reversal of 11220197 is 79102211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5692996 + 5527201 = 2386^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220197 - 2² = 11220193 is a prime.

Together with 11220199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220193) 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 as a sum of consecutive naturals, namely, 5610098 + 5610099.

It is an arithmetic number, because the mean of its divisors is an integer number (5610099).

Almost surely, 2^11220197 is an apocalyptic number.

It is an amenable number.

11220197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220197 is an equidigital number, since it uses as much as digits as its factorization.

11220197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 11220197 is about 3349.6562510204. The cubic root of 11220197 is about 223.8721967066.

The spelling of 11220197 in words is "eleven million, two hundred twenty thousand, one hundred ninety-seven".