221243202321 has 8 divisors (see below), whose sum is σ = 295214589120. Its totient is φ = 147383641872.

The previous prime is 221243202307. The next prime is 221243202331. The reversal of 221243202321 is 123202342122.

221243202321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221243202321 - 2¹⁴ = 221243185937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221243202291 and 221243202300.

It is not an unprimeable number, because it can be changed into a prime (221243202331) 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 7 ways as a sum of consecutive naturals, for example, 27951970 + ... + 27959883.

It is an arithmetic number, because the mean of its divisors is an integer number (36901823640).

Almost surely, 2^221243202321 is an apocalyptic number.

It is an amenable number.

221243202321 is a deficient number, since it is larger than the sum of its proper divisors (73971386799).

221243202321 is a wasteful number, since it uses less digits than its factorization.

221243202321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55913175.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221243202321 its reverse (123202342122), we get a palindrome (344445544443).

The spelling of 221243202321 in words is "two hundred twenty-one billion, two hundred forty-three million, two hundred two thousand, three hundred twenty-one".