11199331128 has 128 divisors (see below), whose sum is σ = 30730752000. Its totient is φ = 3385374720.

The previous prime is 11199331103. The next prime is 11199331147. The reversal of 11199331128 is 82113399111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10778433 + ... + 10779471.

It is an arithmetic number, because the mean of its divisors is an integer number (240084000).

Almost surely, 2^11199331128 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 11199331128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15365376000).

11199331128 is an abundant number, since it is smaller than the sum of its proper divisors (19531420872).

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

11199331128 is a wasteful number, since it uses less digits than its factorization.

11199331128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005 (or 2001 counting only the distinct ones).

The product of its digits is 11664, while the sum is 39.

The spelling of 11199331128 in words is "eleven billion, one hundred ninety-nine million, three hundred thirty-one thousand, one hundred twenty-eight".