243145021099 has 2 divisors, whose sum is σ = 243145021100. Its totient is φ = 243145021098.

The previous prime is 243145021043. The next prime is 243145021139. The reversal of 243145021099 is 990120541342.

243145021099 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 (243145021139) can be obtained adding 243145021099 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243145021099 - 2¹³ = 243145012907 is a prime.

It is not a weakly prime, because it can be changed into another prime (243145021699) 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, 121572510549 + 121572510550.

It is an arithmetic number, because the mean of its divisors is an integer number (121572510550).

Almost surely, 2^243145021099 is an apocalyptic number.

243145021099 is a deficient number, since it is larger than the sum of its proper divisors (1).

243145021099 is an equidigital number, since it uses as much as digits as its factorization.

243145021099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 243145021099 in words is "two hundred forty-three billion, one hundred forty-five million, twenty-one thousand, ninety-nine".