11105881 has 2 divisors, whose sum is σ = 11105882. Its totient is φ = 11105880.

The previous prime is 11105873. The next prime is 11105893. The reversal of 11105881 is 18850111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9665881 + 1440000 = 3109^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 11105881 - 2³ = 11105873 is a prime.

It is a super-2 number, since 2×11105881² = 246681185572322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11105581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5552940 + 5552941.

It is an arithmetic number, because the mean of its divisors is an integer number (5552941).

Almost surely, 2^11105881 is an apocalyptic number.

It is an amenable number.

11105881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11105881 is an equidigital number, since it uses as much as digits as its factorization.

11105881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 25.

The square root of 11105881 is about 3332.5487243250. The cubic root of 11105881 is about 223.1092991120.

Adding to 11105881 its reverse (18850111), we get a palindrome (29955992).

The spelling of 11105881 in words is "eleven million, one hundred five thousand, eight hundred eighty-one".