11001001044 has 72 divisors (see below), whose sum is σ = 28815179904. Its totient is φ = 3262688000.

The previous prime is 11001001043. The next prime is 11001001073. The reversal of 11001001044 is 44010010011.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001001043) 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 23 ways as a sum of consecutive naturals, for example, 12357 + ... + 148844.

It is an arithmetic number, because the mean of its divisors is an integer number (400210832).

Almost surely, 2^11001001044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11001001044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14407589952).

11001001044 is an abundant number, since it is smaller than the sum of its proper divisors (17814178860).

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

11001001044 is a wasteful number, since it uses less digits than its factorization.

11001001044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161277 (or 161264 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11001001044 its reverse (44010010011), we get a palindrome (55011011055).

The spelling of 11001001044 in words is "eleven billion, one million, one thousand, forty-four".