243120424021417 has 2 divisors, whose sum is σ = 243120424021418. Its totient is φ = 243120424021416.

The previous prime is 243120424021313. The next prime is 243120424021421. The reversal of 243120424021417 is 714120424021342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126506796130576 + 116613627890841 = 11247524^2 + 10798779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120424021417 is a prime.

It is not a weakly prime, because it can be changed into another prime (243120424021477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560212010708 + 121560212010709.

It is an arithmetic number, because the mean of its divisors is an integer number (121560212010709).

Almost surely, 2^{243120424021417} is an apocalyptic number.

It is an amenable number.

243120424021417 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120424021417 is an equidigital number, since it uses as much as digits as its factorization.

243120424021417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 37.

Adding to 243120424021417 its reverse (714120424021342), we get a palindrome (957240848042759).

The spelling of 243120424021417 in words is "two hundred forty-three trillion, one hundred twenty billion, four hundred twenty-four million, twenty-one thousand, four hundred seventeen".