11001111111000 has 768 divisors, whose sum is σ = 40812844550400. Its totient is φ = 2660345856000.

The previous prime is 11001111110999. The next prime is 11001111111127. The reversal of 11001111111000 is 11111110011.

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

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2400414709 + ... + 2400419291.

It is an arithmetic number, because the mean of its divisors is an integer number (53141724675).

Almost surely, 2^{11001111111000} is an apocalyptic number.

11001111111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11001111111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20406422275200).

11001111111000 is an abundant number, since it is smaller than the sum of its proper divisors (29811733439400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11001111111000 is a wasteful number, since it uses less digits than its factorization.

11001111111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197 (or 5180 counting only the distinct ones).

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

Adding to 11001111111000 its reverse (11111110011), we get a palindrome (11012222221011).

It can be divided in two parts, 1 and 1001111111000, that added together give a palindrome (1001111111001).

The spelling of 11001111111000 in words is "eleven trillion, one billion, one hundred eleven million, one hundred eleven thousand".