11123340281 has 2 divisors, whose sum is σ = 11123340282. Its totient is φ = 11123340280.

The previous prime is 11123340209. The next prime is 11123340313. The reversal of 11123340281 is 18204332111.

11123340281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6128384656 + 4994955625 = 78284^2 + 70675^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123340281 - 2¹⁰ = 11123339257 is a prime.

It is a super-2 number, since 2×11123340281² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11123340281.

It is not a weakly prime, because it can be changed into another prime (11123340581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561670140 + 5561670141.

It is an arithmetic number, because the mean of its divisors is an integer number (5561670141).

Almost surely, 2^11123340281 is an apocalyptic number.

It is an amenable number.

11123340281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123340281 is an equidigital number, since it uses as much as digits as its factorization.

11123340281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 11123340281 its reverse (18204332111), we get a palindrome (29327672392).

The spelling of 11123340281 in words is "eleven billion, one hundred twenty-three million, three hundred forty thousand, two hundred eighty-one".