243121241339 has 2 divisors, whose sum is σ = 243121241340. Its totient is φ = 243121241338.

The previous prime is 243121241323. The next prime is 243121241369. The reversal of 243121241339 is 933142121342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243121241339 - 2⁴ = 243121241323 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 243121241299 and 243121241308.

It is not a weakly prime, because it can be changed into another prime (243121241369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560620669 + 121560620670.

It is an arithmetic number, because the mean of its divisors is an integer number (121560620670).

Almost surely, 2^243121241339 is an apocalyptic number.

243121241339 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121241339 is an equidigital number, since it uses as much as digits as its factorization.

243121241339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The spelling of 243121241339 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, three hundred thirty-nine".