221203321113221 has 8 divisors (see below), whose sum is σ = 226604903047488. Its totient is φ = 215802042940000.

The previous prime is 221203321113167. The next prime is 221203321113349. The reversal of 221203321113221 is 122311123302122.

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

It is a cyclic number.

It is not a de Polignac number, because 221203321113221 - 2¹⁸ = 221203320851077 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 (221203321113521) 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, 74465705 + ... + 77379246.

It is an arithmetic number, because the mean of its divisors is an integer number (28325612880936).

Almost surely, 2^{221203321113221} is an apocalyptic number.

It is an amenable number.

221203321113221 is a deficient number, since it is larger than the sum of its proper divisors (5401581934267).

221203321113221 is a wasteful number, since it uses less digits than its factorization.

221203321113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151880523.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 221203321113221 its reverse (122311123302122), we get a palindrome (343514444415343).

The spelling of 221203321113221 in words is "two hundred twenty-one trillion, two hundred three billion, three hundred twenty-one million, one hundred thirteen thousand, two hundred twenty-one".