11022181 has 2 divisors, whose sum is σ = 11022182. Its totient is φ = 11022180.

The previous prime is 11022173. The next prime is 11022217. The reversal of 11022181 is 18122011.

11022181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421156 + 4601025 = 2534^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 11022181 - 2³ = 11022173 is a prime.

It is a super-2 number, since 2×11022181² = 242976947993522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11022101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5511090 + 5511091.

It is an arithmetic number, because the mean of its divisors is an integer number (5511091).

Almost surely, 2^11022181 is an apocalyptic number.

It is an amenable number.

11022181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11022181 is an equidigital number, since it uses as much as digits as its factorization.

11022181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 11022181 is about 3319.9670179085. The cubic root of 11022181 is about 222.5473938514.

Adding to 11022181 its reverse (18122011), we get a palindrome (29144192).

The spelling of 11022181 in words is "eleven million, twenty-two thousand, one hundred eighty-one".