242225522221 has 2 divisors, whose sum is σ = 242225522222. Its totient is φ = 242225522220.

The previous prime is 242225522219. The next prime is 242225522303. The reversal of 242225522221 is 122225522242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201022206025 + 41203316196 = 448355^2 + 202986^2 .

It is a cyclic number.

It is not a de Polignac number, because 242225522221 - 2¹ = 242225522219 is a prime.

Together with 242225522219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242225322221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121112761110 + 121112761111.

It is an arithmetic number, because the mean of its divisors is an integer number (121112761111).

Almost surely, 2^242225522221 is an apocalyptic number.

It is an amenable number.

242225522221 is a deficient number, since it is larger than the sum of its proper divisors (1).

242225522221 is an equidigital number, since it uses as much as digits as its factorization.

242225522221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25600, while the sum is 31.

The spelling of 242225522221 in words is "two hundred forty-two billion, two hundred twenty-five million, five hundred twenty-two thousand, two hundred twenty-one".