11091100481 has 4 divisors (see below), whose sum is σ = 11134256772. Its totient is φ = 11047944192.

The previous prime is 11091100477. The next prime is 11091100487. The reversal of 11091100481 is 18400119011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9208321600 + 1882778881 = 95960^2 + 43391^2 .

It is a cyclic number.

It is not a de Polignac number, because 11091100481 - 2² = 11091100477 is a prime.

It is a super-2 number, since 2×11091100481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11091100481.

It is not an unprimeable number, because it can be changed into a prime (11091100487) 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 in 3 ways as a sum of consecutive naturals, for example, 21577760 + ... + 21578273.

It is an arithmetic number, because the mean of its divisors is an integer number (2783564193).

Almost surely, 2^11091100481 is an apocalyptic number.

It is an amenable number.

11091100481 is a deficient number, since it is larger than the sum of its proper divisors (43156291).

11091100481 is an equidigital number, since it uses as much as digits as its factorization.

11091100481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43156290.

The product of its (nonzero) digits is 288, while the sum is 26.

Adding to 11091100481 its reverse (18400119011), we get a palindrome (29491219492).

The spelling of 11091100481 in words is "eleven billion, ninety-one million, one hundred thousand, four hundred eighty-one".