11011001011001 has 4 divisors (see below), whose sum is σ = 11011250732004. Its totient is φ = 11010751290000.

The previous prime is 11011001010937. The next prime is 11011001011013. The reversal of 11011001011001 is 10011010011011.

11011001011001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9985277682601 + 1025723328400 = 3159949^2 + 1012780^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011001011001 - 2⁶ = 11011001010937 is a prime.

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 11011001011001.

It is not an unprimeable number, because it can be changed into a prime (11011001011201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124794350 + ... + 124882551.

It is an arithmetic number, because the mean of its divisors is an integer number (2752812683001).

Almost surely, 2^{11011001011001} is an apocalyptic number.

It is an amenable number.

11011001011001 is a deficient number, since it is larger than the sum of its proper divisors (249721003).

11011001011001 is an equidigital number, since it uses as much as digits as its factorization.

11011001011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249721002.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 11011001011001 its reverse (10011010011011), we get a palindrome (21022011022012).

It can be divided in two parts, 110110010 and 11001, that added together give a palindrome (110121011).

The spelling of 11011001011001 in words is "eleven trillion, eleven billion, one million, eleven thousand, one".