243121209883 has 2 divisors, whose sum is σ = 243121209884. Its totient is φ = 243121209882.

The previous prime is 243121209871. The next prime is 243121209889. The reversal of 243121209883 is 388902121342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243121209883 - 2⁹ = 243121209371 is a prime.

It is not a weakly prime, because it can be changed into another prime (243121209889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560604941 + 121560604942.

It is an arithmetic number, because the mean of its divisors is an integer number (121560604942).

Almost surely, 2^243121209883 is an apocalyptic number.

243121209883 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121209883 is an equidigital number, since it uses as much as digits as its factorization.

243121209883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 243121209883 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred nine thousand, eight hundred eighty-three".