11521320000 has 280 divisors, whose sum is σ = 38687690976. Its totient is φ = 3024384000.

The previous prime is 11521319993. The next prime is 11521320017. The reversal of 11521320000 is 2312511.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 8039284 + ... + 8040716.

Almost surely, 2^11521320000 is an apocalyptic number.

11521320000 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 11521320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19343845488).

11521320000 is an abundant number, since it is smaller than the sum of its proper divisors (27166370976).

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

11521320000 is an equidigital number, since it uses as much as digits as its factorization.

11521320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 11521320000 its reverse (2312511), we get a palindrome (11523632511).

The spelling of 11521320000 in words is "eleven billion, five hundred twenty-one million, three hundred twenty thousand".