11109221604 has 120 divisors (see below), whose sum is σ = 31484602688. Its totient is φ = 3395390400.

The previous prime is 11109221581. The next prime is 11109221713. The reversal of 11109221604 is 40612290111.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 627279 + ... + 644745.

Almost surely, 2^11109221604 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 11109221604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15742301344).

11109221604 is an abundant number, since it is smaller than the sum of its proper divisors (20375381084).

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

11109221604 is a wasteful number, since it uses less digits than its factorization.

11109221604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17647 (or 17636 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 11109221604 in words is "eleven billion, one hundred nine million, two hundred twenty-one thousand, six hundred four".