221421203572223 has 8 divisors (see below), whose sum is σ = 234743878590192. Its totient is φ = 208131628369536.

The previous prime is 221421203572187. The next prime is 221421203572249. The reversal of 221421203572223 is 322275302124122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221421203572223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421203572273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8274940040 + ... + 8274966797.

It is an arithmetic number, because the mean of its divisors is an integer number (29342984823774).

Almost surely, 2^{221421203572223} is an apocalyptic number.

221421203572223 is a deficient number, since it is larger than the sum of its proper divisors (13322675017969).

221421203572223 is a wasteful number, since it uses less digits than its factorization.

221421203572223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16549907641.

The product of its (nonzero) digits is 161280, while the sum is 38.

Adding to 221421203572223 its reverse (322275302124122), we get a palindrome (543696505696345).

The spelling of 221421203572223 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, five hundred seventy-two thousand, two hundred twenty-three".