201023113217 has 2 divisors, whose sum is σ = 201023113218. Its totient is φ = 201023113216.

The previous prime is 201023113199. The next prime is 201023113229. The reversal of 201023113217 is 712311320102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108129826561 + 92893286656 = 328831^2 + 304784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201023113217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201023113192 and 201023113201.

It is not a weakly prime, because it can be changed into another prime (201023113517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100511556608 + 100511556609.

It is an arithmetic number, because the mean of its divisors is an integer number (100511556609).

Almost surely, 2^201023113217 is an apocalyptic number.

It is an amenable number.

201023113217 is a deficient number, since it is larger than the sum of its proper divisors (1).

201023113217 is an equidigital number, since it uses as much as digits as its factorization.

201023113217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 201023113217 its reverse (712311320102), we get a palindrome (913334433319).

The spelling of 201023113217 in words is "two hundred one billion, twenty-three million, one hundred thirteen thousand, two hundred seventeen".