221232310232221 has 16 divisors (see below), whose sum is σ = 222180784862400. Its totient is φ = 220284534804480.

The previous prime is 221232310232177. The next prime is 221232310232251. The reversal of 221232310232221 is 122232013232122.

It is a cyclic number.

It is not a de Polignac number, because 221232310232221 - 2³⁵ = 221197950493853 is a prime.

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 221232310232221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232310232251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8104030830 + ... + 8104058128.

It is an arithmetic number, because the mean of its divisors is an integer number (13886299053900).

Almost surely, 2^{221232310232221} is an apocalyptic number.

It is an amenable number.

221232310232221 is a deficient number, since it is larger than the sum of its proper divisors (948474630179).

221232310232221 is a wasteful number, since it uses less digits than its factorization.

221232310232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38844.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 221232310232221 its reverse (122232013232122), we get a palindrome (343464323464343).

The spelling of 221232310232221 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, three hundred ten million, two hundred thirty-two thousand, two hundred twenty-one".