11201321321 has 4 divisors (see below), whose sum is σ = 11204763732. Its totient is φ = 11197878912.

The previous prime is 11201321309. The next prime is 11201321323. The reversal of 11201321321 is 12312310211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6490558096 + 4710763225 = 80564^2 + 68635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11201321321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11201321321.

It is not an unprimeable number, because it can be changed into a prime (11201321323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1716320 + ... + 1722833.

It is an arithmetic number, because the mean of its divisors is an integer number (2801190933).

Almost surely, 2^11201321321 is an apocalyptic number.

It is an amenable number.

11201321321 is a deficient number, since it is larger than the sum of its proper divisors (3442411).

11201321321 is an equidigital number, since it uses as much as digits as its factorization.

11201321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442410.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11201321321 its reverse (12312310211), we get a palindrome (23513631532).

The spelling of 11201321321 in words is "eleven billion, two hundred one million, three hundred twenty-one thousand, three hundred twenty-one".