11103320581 has 2 divisors, whose sum is σ = 11103320582. Its totient is φ = 11103320580.

The previous prime is 11103320573. The next prime is 11103320597. The reversal of 11103320581 is 18502330111.

11103320581 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., 6916583556 + 4186737025 = 83166^2 + 64705^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103320581 - 2³ = 11103320573 is a prime.

It is a super-2 number, since 2×11103320581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11103320881) 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, 5551660290 + 5551660291.

It is an arithmetic number, because the mean of its divisors is an integer number (5551660291).

Almost surely, 2^11103320581 is an apocalyptic number.

It is an amenable number.

11103320581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103320581 is an equidigital number, since it uses as much as digits as its factorization.

11103320581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 11103320581 its reverse (18502330111), we get a palindrome (29605650692).

The spelling of 11103320581 in words is "eleven billion, one hundred three million, three hundred twenty thousand, five hundred eighty-one".