11550122500 has 120 divisors (see below), whose sum is σ = 29539294400. Its totient is φ = 3867696000.

The previous prime is 11550122491. The next prime is 11550122503. The reversal of 11550122500 is 522105511.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11550122503) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 744826 + ... + 760174.

Almost surely, 2^11550122500 is an apocalyptic number.

11550122500 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 11550122500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14769647200).

11550122500 is an abundant number, since it is smaller than the sum of its proper divisors (17989171900).

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

11550122500 is a wasteful number, since it uses less digits than its factorization.

11550122500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15423 (or 15406 counting only the distinct ones).

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

The spelling of 11550122500 in words is "eleven billion, five hundred fifty million, one hundred twenty-two thousand, five hundred".