221441443321 has 24 divisors (see below), whose sum is σ = 260160969096. Its totient is φ = 187924988160.

The previous prime is 221441443291. The next prime is 221441443357. The reversal of 221441443321 is 123344144122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 89123743296 + 132317700025 = 298536^2 + 363755^2 .

It is not a de Polignac number, because 221441443321 - 2²¹ = 221439346169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221441443361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2110515 + ... + 2212951.

It is an arithmetic number, because the mean of its divisors is an integer number (10840040379).

Almost surely, 2^221441443321 is an apocalyptic number.

It is an amenable number.

221441443321 is a deficient number, since it is larger than the sum of its proper divisors (38719525775).

221441443321 is a wasteful number, since it uses less digits than its factorization.

221441443321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102889 (or 102882 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

Adding to 221441443321 its reverse (123344144122), we get a palindrome (344785587443).

The spelling of 221441443321 in words is "two hundred twenty-one billion, four hundred forty-one million, four hundred forty-three thousand, three hundred twenty-one".