11001100520 has 64 divisors (see below), whose sum is σ = 26317645200. Its totient is φ = 4124344320.

The previous prime is 11001100499. The next prime is 11001100531. The reversal of 11001100520 is 2500110011.

It can be written as a sum of positive squares in 8 ways, for example, as 8677667716 + 2323432804 = 93154^2 + 48202^2 .

It is a super-2 number, since 2×11001100520² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130316 + ... + 197444.

Almost surely, 2^11001100520 is an apocalyptic number.

11001100520 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 11001100520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13158822600).

11001100520 is an abundant number, since it is smaller than the sum of its proper divisors (15316544680).

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

11001100520 is a wasteful number, since it uses less digits than its factorization.

11001100520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67398 (or 67394 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 11.

Adding to 11001100520 its reverse (2500110011), we get a palindrome (13501210531).

The spelling of 11001100520 in words is "eleven billion, one million, one hundred thousand, five hundred twenty".