11130221 has 2 divisors, whose sum is σ = 11130222. Its totient is φ = 11130220.

The previous prime is 11130199. The next prime is 11130227. The reversal of 11130221 is 12203111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 1276900 = 3139^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 11130221 - 2⁶ = 11130157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11130227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565110 + 5565111.

It is an arithmetic number, because the mean of its divisors is an integer number (5565111).

Almost surely, 2^11130221 is an apocalyptic number.

It is an amenable number.

11130221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11130221 is an equidigital number, since it uses as much as digits as its factorization.

11130221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 11130221 is about 3336.1985852164. The cubic root of 11130221 is about 223.2721713164.

Adding to 11130221 its reverse (12203111), we get a palindrome (23333332).

The spelling of 11130221 in words is "eleven million, one hundred thirty thousand, two hundred twenty-one".