242242242221 has 6 divisors (see below), whose sum is σ = 281791996110. Its totient is φ = 207636207576.

The previous prime is 242242242217. The next prime is 242242242247. The reversal of 242242242221 is 122242242242.

242242242221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 241460200996 + 782041225 = 491386^2 + 27965^2 .

It is not a de Polignac number, because 242242242221 - 2² = 242242242217 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 (242242242251) 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 in 5 ways as a sum of consecutive naturals, for example, 2471859566 + ... + 2471859663.

It is an arithmetic number, because the mean of its divisors is an integer number (46965332685).

Almost surely, 2^242242242221 is an apocalyptic number.

It is an amenable number.

242242242221 is a deficient number, since it is larger than the sum of its proper divisors (39549753889).

242242242221 is an equidigital number, since it uses as much as digits as its factorization.

242242242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943719243 (or 4943719236 counting only the distinct ones).

The product of its digits is 16384, while the sum is 29.

Adding to 242242242221 its reverse (122242242242), we get a palindrome (364484484463).

The spelling of 242242242221 in words is "two hundred forty-two billion, two hundred forty-two million, two hundred forty-two thousand, two hundred twenty-one".