243120203201 has 2 divisors, whose sum is σ = 243120203202. Its totient is φ = 243120203200.

The previous prime is 243120203189. The next prime is 243120203273. The reversal of 243120203201 is 102302021342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188959743025 + 54160460176 = 434695^2 + 232724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120203201 is a prime.

It is not a weakly prime, because it can be changed into another prime (243120203281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560101600 + 121560101601.

It is an arithmetic number, because the mean of its divisors is an integer number (121560101601).

Almost surely, 2^243120203201 is an apocalyptic number.

It is an amenable number.

243120203201 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120203201 is an equidigital number, since it uses as much as digits as its factorization.

243120203201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 243120203201 its reverse (102302021342), we get a palindrome (345422224543).

The spelling of 243120203201 in words is "two hundred forty-three billion, one hundred twenty million, two hundred three thousand, two hundred one".