243322334221 has 2 divisors, whose sum is σ = 243322334222. Its totient is φ = 243322334220.

The previous prime is 243322334197. The next prime is 243322334257. The reversal of 243322334221 is 122433223342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243306414121 + 15920100 = 493261^2 + 3990^2 .

It is a cyclic number.

It is not a de Polignac number, because 243322334221 - 2¹⁷ = 243322203149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243322334621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121661167110 + 121661167111.

It is an arithmetic number, because the mean of its divisors is an integer number (121661167111).

Almost surely, 2^243322334221 is an apocalyptic number.

It is an amenable number.

243322334221 is a deficient number, since it is larger than the sum of its proper divisors (1).

243322334221 is an equidigital number, since it uses as much as digits as its factorization.

243322334221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 31.

Adding to 243322334221 its reverse (122433223342), we get a palindrome (365755557563).

The spelling of 243322334221 in words is "two hundred forty-three billion, three hundred twenty-two million, three hundred thirty-four thousand, two hundred twenty-one".