221323331044443 has 4 divisors (see below), whose sum is σ = 295097774725928. Its totient is φ = 147548887362960.

The previous prime is 221323331044441. The next prime is 221323331044513. The reversal of 221323331044443 is 344440133323122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221323331044443 - 2¹ = 221323331044441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221323331044441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36887221840738 + ... + 36887221840743.

It is an arithmetic number, because the mean of its divisors is an integer number (73774443681482).

Almost surely, 2^{221323331044443} is an apocalyptic number.

221323331044443 is a deficient number, since it is larger than the sum of its proper divisors (73774443681485).

221323331044443 is an equidigital number, since it uses as much as digits as its factorization.

221323331044443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73774443681484.

The product of its (nonzero) digits is 497664, while the sum is 39.

Adding to 221323331044443 its reverse (344440133323122), we get a palindrome (565763464367565).

The spelling of 221323331044443 in words is "two hundred twenty-one trillion, three hundred twenty-three billion, three hundred thirty-one million, forty-four thousand, four hundred forty-three".