201123230100217 has 2 divisors, whose sum is σ = 201123230100218. Its totient is φ = 201123230100216.

The previous prime is 201123230100193. The next prime is 201123230100259. The reversal of 201123230100217 is 712001032321102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199962818554041 + 1160411546176 = 14140821^2 + 1077224^2 .

It is a cyclic number.

It is not a de Polignac number, because 201123230100217 - 2¹⁹ = 201123229575929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201123230100191 and 201123230100200.

It is not a weakly prime, because it can be changed into another prime (201123230100017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561615050108 + 100561615050109.

It is an arithmetic number, because the mean of its divisors is an integer number (100561615050109).

Almost surely, 2^{201123230100217} is an apocalyptic number.

It is an amenable number.

201123230100217 is a deficient number, since it is larger than the sum of its proper divisors (1).

201123230100217 is an equidigital number, since it uses as much as digits as its factorization.

201123230100217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 201123230100217 its reverse (712001032321102), we get a palindrome (913124262421319).

The spelling of 201123230100217 in words is "two hundred one trillion, one hundred twenty-three billion, two hundred thirty million, one hundred thousand, two hundred seventeen".