11001001100 has 72 divisors (see below), whose sum is σ = 24547137216. Its totient is φ = 4276800000.

The previous prime is 11001001097. The next prime is 11001001129. The reversal of 11001001100 is 110010011.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1106150 + ... + 1116050.

Almost surely, 2^11001001100 is an apocalyptic number.

11001001100 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 11001001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12273568608).

11001001100 is an abundant number, since it is smaller than the sum of its proper divisors (13546136116).

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

11001001100 is a wasteful number, since it uses less digits than its factorization.

11001001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10227 (or 10220 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 5.

Adding to 11001001100 its reverse (110010011), we get a palindrome (11111011111).

11001001100 divided by its reverse (110010011) gives a square (100 = 10²).

The spelling of 11001001100 in words is "eleven billion, one million, one thousand, one hundred".