11001111001001 has 8 divisors (see below), whose sum is σ = 12001239153984. Its totient is φ = 10000987373520.

The previous prime is 11001111000991. The next prime is 11001111001019. The reversal of 11001111001001 is 10010011110011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11001111001001 - 2⁶ = 11001111000937 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 11001111001001.

It is not an unprimeable number, because it can be changed into a prime (11001111001081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5795276 + ... + 7455698.

It is an arithmetic number, because the mean of its divisors is an integer number (1500154894248).

Almost surely, 2^{11001111001001} is an apocalyptic number.

11001111001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11001111001001 is a deficient number, since it is larger than the sum of its proper divisors (1000128152983).

11001111001001 is a wasteful number, since it uses less digits than its factorization.

11001111001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262751.

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

Adding to 11001111001001 its reverse (10010011110011), we get a palindrome (21011122111012).

The spelling of 11001111001001 in words is "eleven trillion, one billion, one hundred eleven million, one thousand, one".