321434401202221 has 4 divisors (see below), whose sum is σ = 321499037121372. Its totient is φ = 321369765283072.

The previous prime is 321434401202219. The next prime is 321434401202267. The reversal of 321434401202221 is 122202104434123.

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

It can be written as a sum of positive squares in 2 ways, for example, as 87978584496100 + 233455816706121 = 9379690^2 + 15279261^2 .

It is a cyclic number.

It is not a de Polignac number, because 321434401202221 - 2¹ = 321434401202219 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 (321434401202281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32317952116 + ... + 32317962061.

It is an arithmetic number, because the mean of its divisors is an integer number (80374759280343).

Almost surely, 2^{321434401202221} is an apocalyptic number.

It is an amenable number.

321434401202221 is a deficient number, since it is larger than the sum of its proper divisors (64635919151).

321434401202221 is an equidigital number, since it uses as much as digits as its factorization.

321434401202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64635919150.

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

Adding to 321434401202221 its reverse (122202104434123), we get a palindrome (443636505636344).

The spelling of 321434401202221 in words is "three hundred twenty-one trillion, four hundred thirty-four billion, four hundred one million, two hundred two thousand, two hundred twenty-one".