211301023217 has 2 divisors, whose sum is σ = 211301023218. Its totient is φ = 211301023216.

The previous prime is 211301023187. The next prime is 211301023229. The reversal of 211301023217 is 712320103112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164568960241 + 46732062976 = 405671^2 + 216176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211301023217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211301023192 and 211301023201.

It is not a weakly prime, because it can be changed into another prime (211301023247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105650511608 + 105650511609.

It is an arithmetic number, because the mean of its divisors is an integer number (105650511609).

Almost surely, 2^211301023217 is an apocalyptic number.

It is an amenable number.

211301023217 is a deficient number, since it is larger than the sum of its proper divisors (1).

211301023217 is an equidigital number, since it uses as much as digits as its factorization.

211301023217 is an evil number, because the sum of its binary digits is even.

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

Adding to 211301023217 its reverse (712320103112), we get a palindrome (923621126329).

The spelling of 211301023217 in words is "two hundred eleven billion, three hundred one million, twenty-three thousand, two hundred seventeen".