443343330421221 has 4 divisors (see below), whose sum is σ = 591124440561632. Its totient is φ = 295562220280812.

The previous prime is 443343330421183. The next prime is 443343330421223. The reversal of 443343330421221 is 122124033343344.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 443343330421221 - 2⁶ = 443343330421157 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 443343330421221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443343330421223) 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, 73890555070201 + ... + 73890555070206.

It is an arithmetic number, because the mean of its divisors is an integer number (147781110140408).

Almost surely, 2^{443343330421221} is an apocalyptic number.

It is an amenable number.

443343330421221 is a deficient number, since it is larger than the sum of its proper divisors (147781110140411).

443343330421221 is a wasteful number, since it uses less digits than its factorization.

443343330421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147781110140410.

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

Adding to 443343330421221 its reverse (122124033343344), we get a palindrome (565467363764565).

The spelling of 443343330421221 in words is "four hundred forty-three trillion, three hundred forty-three billion, three hundred thirty million, four hundred twenty-one thousand, two hundred twenty-one".