11125205500 has 96 divisors (see below), whose sum is σ = 24898648320. Its totient is φ = 4340633600.

The previous prime is 11125205477. The next prime is 11125205513. The reversal of 11125205500 is 550252111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 9140892 + ... + 9142108.

It is an arithmetic number, because the mean of its divisors is an integer number (259360920).

Almost surely, 2^11125205500 is an apocalyptic number.

11125205500 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 11125205500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12449324160).

11125205500 is an abundant number, since it is smaller than the sum of its proper divisors (13773442820).

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

11125205500 is a wasteful number, since it uses less digits than its factorization.

11125205500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 11125205500 its reverse (550252111), we get a palindrome (11675457611).

The spelling of 11125205500 in words is "eleven billion, one hundred twenty-five million, two hundred five thousand, five hundred".