221311030321 has 16 divisors (see below), whose sum is σ = 226940313600. Its totient is φ = 215704189008.

The previous prime is 221311030319. The next prime is 221311030327. The reversal of 221311030321 is 123030113122.

It is a cyclic number.

It is not a de Polignac number, because 221311030321 - 2¹ = 221311030319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221311030327) 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 15 ways as a sum of consecutive naturals, for example, 76869360 + ... + 76872238.

It is an arithmetic number, because the mean of its divisors is an integer number (14183769600).

Almost surely, 2^221311030321 is an apocalyptic number.

It is an amenable number.

221311030321 is a deficient number, since it is larger than the sum of its proper divisors (5629283279).

221311030321 is a wasteful number, since it uses less digits than its factorization.

221311030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221311030321 its reverse (123030113122), we get a palindrome (344341143443).

The spelling of 221311030321 in words is "two hundred twenty-one billion, three hundred eleven million, thirty thousand, three hundred twenty-one".