11216281 has 2 divisors, whose sum is σ = 11216282. Its totient is φ = 11216280.

The previous prime is 11216279. The next prime is 11216287. The reversal of 11216281 is 18261211.

11216281 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., 9211225 + 2005056 = 3035^2 + 1416^2 .

It is an emirp because it is prime and its reverse (18261211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11216281 - 2¹ = 11216279 is a prime.

It is a super-2 number, since 2×11216281² = 251609918941922, which contains 22 as substring.

Together with 11216279, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (11216287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5608140 + 5608141.

It is an arithmetic number, because the mean of its divisors is an integer number (5608141).

Almost surely, 2^11216281 is an apocalyptic number.

It is an amenable number.

11216281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11216281 is an equidigital number, since it uses as much as digits as its factorization.

11216281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 22.

The square root of 11216281 is about 3349.0716624163. The cubic root of 11216281 is about 223.8461488712.

Adding to 11216281 its reverse (18261211), we get a palindrome (29477492).

The spelling of 11216281 in words is "eleven million, two hundred sixteen thousand, two hundred eighty-one".