11321320320 has 256 divisors, whose sum is σ = 40285512000. Its totient is φ = 3004784640.

The previous prime is 11321320261. The next prime is 11321320331. The reversal of 11321320320 is 2302312311.

11321320320 is a `hidden beast` number, since 1 + 1 + 3 + 21 + 320 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 11321320293 and 11321320302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3955690 + ... + 3958550.

Almost surely, 2^11321320320 is an apocalyptic number.

11321320320 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 11321320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20142756000).

11321320320 is an abundant number, since it is smaller than the sum of its proper divisors (28964191680).

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

11321320320 is a wasteful number, since it uses less digits than its factorization.

11321320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118 (or 3100 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 11321320320 its reverse (2302312311), we get a palindrome (13623632631).

The spelling of 11321320320 in words is "eleven billion, three hundred twenty-one million, three hundred twenty thousand, three hundred twenty".