242543330321 has 2 divisors, whose sum is σ = 242543330322. Its totient is φ = 242543330320.

The previous prime is 242543330273. The next prime is 242543330327. The reversal of 242543330321 is 123033345242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163346113921 + 79197216400 = 404161^2 + 281420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242543330321 is a prime.

It is not a weakly prime, because it can be changed into another prime (242543330327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121271665160 + 121271665161.

It is an arithmetic number, because the mean of its divisors is an integer number (121271665161).

Almost surely, 2^242543330321 is an apocalyptic number.

It is an amenable number.

242543330321 is a deficient number, since it is larger than the sum of its proper divisors (1).

242543330321 is an equidigital number, since it uses as much as digits as its factorization.

242543330321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 242543330321 its reverse (123033345242), we get a palindrome (365576675563).

The spelling of 242543330321 in words is "two hundred forty-two billion, five hundred forty-three million, three hundred thirty thousand, three hundred twenty-one".