211211017 has 2 divisors, whose sum is σ = 211211018. Its totient is φ = 211211016.

The previous prime is 211210963. The next prime is 211211023. The reversal of 211211017 is 710112112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157276681 + 53934336 = 12541^2 + 7344^2 .

It is a cyclic number.

It is not a de Polignac number, because 211211017 - 2⁷ = 211210889 is a prime.

It is a super-2 number, since 2×211211017² = 89220187404348578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211211617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605508 + 105605509.

It is an arithmetic number, because the mean of its divisors is an integer number (105605509).

Almost surely, 2^211211017 is an apocalyptic number.

It is an amenable number.

211211017 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211017 is an equidigital number, since it uses as much as digits as its factorization.

211211017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 211211017 is about 14533.1007359063. The cubic root of 211211017 is about 595.5325759073.

Adding to 211211017 its reverse (710112112), we get a palindrome (921323129).

The spelling of 211211017 in words is "two hundred eleven million, two hundred eleven thousand, seventeen".