11100111001001 has 8 divisors (see below), whose sum is σ = 12109265457600. Its totient is φ = 10090965453840.

The previous prime is 11100111000991. The next prime is 11100111001087. The reversal of 11100111001001 is 10010011100111.

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

It is a cyclic number.

It is not a de Polignac number, because 11100111001001 - 2³⁸ = 10825233094057 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 11100111001001.

It is not an unprimeable number, because it can be changed into a prime (11100111001601) 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 7 ways as a sum of consecutive naturals, for example, 525620 + ... + 4740938.

It is an arithmetic number, because the mean of its divisors is an integer number (1513658182200).

Almost surely, 2^{11100111001001} is an apocalyptic number.

11100111001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11100111001001 is a deficient number, since it is larger than the sum of its proper divisors (1009154456599).

11100111001001 is a wasteful number, since it uses less digits than its factorization.

11100111001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454719.

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

Adding to 11100111001001 its reverse (10010011100111), we get a palindrome (21110122101112).

The spelling of 11100111001001 in words is "eleven trillion, one hundred billion, one hundred eleven million, one thousand, one".