11321201321 has 4 divisors (see below), whose sum is σ = 11322796500. Its totient is φ = 11319606144.

The previous prime is 11321201317. The next prime is 11321201329. The reversal of 11321201321 is 12310212311.

11321201321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8354874025 + 2966327296 = 91405^2 + 54464^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321201321 - 2² = 11321201317 is a prime.

It is a super-2 number, since 2×11321201321² (a number of 21 digits) contains 22 as substring.

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 11321201321.

It is not an unprimeable number, because it can be changed into a prime (11321201329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786896 + ... + 801153.

It is an arithmetic number, because the mean of its divisors is an integer number (2830699125).

Almost surely, 2^11321201321 is an apocalyptic number.

It is an amenable number.

11321201321 is a deficient number, since it is larger than the sum of its proper divisors (1595179).

11321201321 is an equidigital number, since it uses as much as digits as its factorization.

11321201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595178.

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

Adding to 11321201321 its reverse (12310212311), we get a palindrome (23631413632).

The spelling of 11321201321 in words is "eleven billion, three hundred twenty-one million, two hundred one thousand, three hundred twenty-one".