11011001000999 has 4 divisors (see below), whose sum is σ = 11012296269000. Its totient is φ = 11009705733000.

The previous prime is 11011001000899. The next prime is 11011001001043. The reversal of 11011001000999 is 99900010011011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11011001000999 - 2¹² = 11011000996903 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 (11011001000899) 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, 647621249 + ... + 647638250.

It is an arithmetic number, because the mean of its divisors is an integer number (2753074067250).

Almost surely, 2^{11011001000999} is an apocalyptic number.

11011001000999 is a deficient number, since it is larger than the sum of its proper divisors (1295268001).

11011001000999 is an equidigital number, since it uses as much as digits as its factorization.

11011001000999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295268000.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 11011001000999 in words is "eleven trillion, eleven billion, one million, nine hundred ninety-nine", and thus it is an aban number.