221303411321 has 4 divisors (see below), whose sum is σ = 221306207652. Its totient is φ = 221300614992.

The previous prime is 221303411269. The next prime is 221303411333. The reversal of 221303411321 is 123114303122.

221303411321 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 33000355600 + 188303055721 = 181660^2 + 433939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221303411321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221303411521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275890 + ... + 1438923.

It is an arithmetic number, because the mean of its divisors is an integer number (55326551913).

Almost surely, 2^221303411321 is an apocalyptic number.

It is an amenable number.

221303411321 is a deficient number, since it is larger than the sum of its proper divisors (2796331).

221303411321 is an equidigital number, since it uses as much as digits as its factorization.

221303411321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796330.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 221303411321 its reverse (123114303122), we get a palindrome (344417714443).

The spelling of 221303411321 in words is "two hundred twenty-one billion, three hundred three million, four hundred eleven thousand, three hundred twenty-one".