11011111001101 has 4 divisors (see below), whose sum is σ = 11120131902204. Its totient is φ = 10902090100000.

The previous prime is 11011111001089. The next prime is 11011111001129. The reversal of 11011111001101 is 10110011111011.

It is a happy number.

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 8568798417001 + 2442312584100 = 2927251^2 + 1562790^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011111001101 - 2¹³ = 11011110992909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111001141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54510450400 + ... + 54510450601.

It is an arithmetic number, because the mean of its divisors is an integer number (2780032975551).

Almost surely, 2^{11011111001101} is an apocalyptic number.

It is an amenable number.

11011111001101 is a deficient number, since it is larger than the sum of its proper divisors (109020901103).

11011111001101 is a wasteful number, since it uses less digits than its factorization.

11011111001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109020901102.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 11011111001101 its reverse (10110011111011), we get a palindrome (21121122112112).

The spelling of 11011111001101 in words is "eleven trillion, eleven billion, one hundred eleven million, one thousand, one hundred one".