11011011011001 has 24 divisors (see below), whose sum is σ = 16073600481120. Its totient is φ = 7262808765696.

The previous prime is 11011011010999. The next prime is 11011011011113. The reversal of 11011011011001 is 10011011011011.

It is not a de Polignac number, because 11011011011001 - 2¹ = 11011011010999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11011011011501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1003170 + ... + 4798788.

It is an arithmetic number, because the mean of its divisors is an integer number (669733353380).

Almost surely, 2^{11011011011001} is an apocalyptic number.

It is an amenable number.

11011011011001 is a deficient number, since it is larger than the sum of its proper divisors (5062589470119).

11011011011001 is a wasteful number, since it uses less digits than its factorization.

11011011011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799045 (or 3799042 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 11011011011001 its reverse (10011011011011), we get a palindrome (21022022022012).

The spelling of 11011011011001 in words is "eleven trillion, eleven billion, eleven million, eleven thousand, one".