221230303321 has 4 divisors (see below), whose sum is σ = 228858934500. Its totient is φ = 213601672144.

The previous prime is 221230303313. The next prime is 221230303361. The reversal of 221230303321 is 123303032122.

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 171528505600 + 49701797721 = 414160^2 + 222939^2 .

It is a cyclic number.

It is not a de Polignac number, because 221230303321 - 2³ = 221230303313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221230303292 and 221230303301.

It is not an unprimeable number, because it can be changed into a prime (221230303361) 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, 3814315546 + ... + 3814315603.

It is an arithmetic number, because the mean of its divisors is an integer number (57214733625).

Almost surely, 2^221230303321 is an apocalyptic number.

It is an amenable number.

221230303321 is a deficient number, since it is larger than the sum of its proper divisors (7628631179).

221230303321 is an equidigital number, since it uses as much as digits as its factorization.

221230303321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628631178.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 221230303321 its reverse (123303032122), we get a palindrome (344533335443).

The spelling of 221230303321 in words is "two hundred twenty-one billion, two hundred thirty million, three hundred three thousand, three hundred twenty-one".