242120532221 has 2 divisors, whose sum is σ = 242120532222. Its totient is φ = 242120532220.

The previous prime is 242120532191. The next prime is 242120532223. The reversal of 242120532221 is 122235021242.

242120532221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239844288121 + 2276244100 = 489739^2 + 47710^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120532221 - 2¹⁰ = 242120531197 is a prime.

Together with 242120532223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242120532223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121060266110 + 121060266111.

It is an arithmetic number, because the mean of its divisors is an integer number (121060266111).

Almost surely, 2^242120532221 is an apocalyptic number.

It is an amenable number.

242120532221 is a deficient number, since it is larger than the sum of its proper divisors (1).

242120532221 is an equidigital number, since it uses as much as digits as its factorization.

242120532221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 242120532221 its reverse (122235021242), we get a palindrome (364355553463).

The spelling of 242120532221 in words is "two hundred forty-two billion, one hundred twenty million, five hundred thirty-two thousand, two hundred twenty-one".