11202221 has 2 divisors, whose sum is σ = 11202222.
Its totient is φ = 11202220.
The previous prime is 11202209. The next prime is 11202241. The reversal of 11202221 is 12220211.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 7645225 + 3556996 = 2765^2 + 1886^2
It is a cyclic number.
It is not a de Polignac number, because 11202221 - 218 = 10940077 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (11202241) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601110 + 5601111.
It is an arithmetic number, because the mean of its divisors is an integer number (5601111).
Almost surely, 211202221 is an apocalyptic number.
It is an amenable number.
11202221 is a deficient number, since it is larger than the sum of its proper divisors (1).
11202221 is an equidigital number, since it uses as much as digits as its factorization.
11202221 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 11202221 is about 3346.9719150301.
The cubic root of 11202221 is about 223.7525767730.
Adding to 11202221 its reverse (12220211), we get a palindrome (23422432).
The spelling of 11202221 in words is "eleven million, two hundred two thousand, two hundred twenty-one".