11001001128 has 64 divisors (see below), whose sum is σ = 29628056640. Its totient is φ = 3383783424.

The previous prime is 11001001097. The next prime is 11001001129. The reversal of 11001001128 is 82110010011.

It is not an unprimeable number, because it can be changed into a prime (11001001129) 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 15 ways as a sum of consecutive naturals, for example, 1845000 + ... + 1850952.

It is an arithmetic number, because the mean of its divisors is an integer number (462938385).

Almost surely, 2^11001001128 is an apocalyptic number.

It is an amenable number.

11001001128 is an abundant number, since it is smaller than the sum of its proper divisors (18627055512).

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

11001001128 is a wasteful number, since it uses less digits than its factorization.

11001001128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11898 (or 11894 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11001001128 its reverse (82110010011), we get a palindrome (93111011139).

The spelling of 11001001128 in words is "eleven billion, one million, one thousand, one hundred twenty-eight".