11520203130 has 120 divisors (see below), whose sum is σ = 31229135388. Its totient is φ = 3047196672.

The previous prime is 11520203069. The next prime is 11520203141. The reversal of 11520203130 is 3130202511.

11520203130 is a `hidden beast` number, since 11 + 520 + 2 + 0 + 3 + 130 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6527508849 + 4992694281 = 80793^2 + 70659^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 19965402 + ... + 19965978.

Almost surely, 2^11520203130 is an apocalyptic number.

11520203130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11520203130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15614567694).

11520203130 is an abundant number, since it is smaller than the sum of its proper divisors (19708932258).

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

11520203130 is an equidigital number, since it uses as much as digits as its factorization.

11520203130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 11520203130 its reverse (3130202511), we get a palindrome (14650405641).

The spelling of 11520203130 in words is "eleven billion, five hundred twenty million, two hundred three thousand, one hundred thirty".