243120334099 has 2 divisors, whose sum is σ = 243120334100. Its totient is φ = 243120334098.

The previous prime is 243120334097. The next prime is 243120334139. The reversal of 243120334099 is 990433021342.

It is a happy number.

243120334099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (243120334139) can be obtained adding 243120334099 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243120334099 - 2¹ = 243120334097 is a prime.

Together with 243120334097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (243120334097) 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 as a sum of consecutive naturals, namely, 121560167049 + 121560167050.

It is an arithmetic number, because the mean of its divisors is an integer number (121560167050).

Almost surely, 2^243120334099 is an apocalyptic number.

243120334099 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120334099 is an equidigital number, since it uses as much as digits as its factorization.

243120334099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 243120334099 in words is "two hundred forty-three billion, one hundred twenty million, three hundred thirty-four thousand, ninety-nine".