243121245347 has 2 divisors, whose sum is σ = 243121245348. Its totient is φ = 243121245346.

The previous prime is 243121245331. The next prime is 243121245397. The reversal of 243121245347 is 743542121342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243121245347 - 2⁴ = 243121245331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243121245347.

It is not a weakly prime, because it can be changed into another prime (243121245397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560622673 + 121560622674.

It is an arithmetic number, because the mean of its divisors is an integer number (121560622674).

Almost surely, 2^243121245347 is an apocalyptic number.

243121245347 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121245347 is an equidigital number, since it uses as much as digits as its factorization.

243121245347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 38.

Adding to 243121245347 its reverse (743542121342), we get a palindrome (986663366689).

The spelling of 243121245347 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, three hundred forty-seven".