206117011 has 2 divisors, whose sum is σ = 206117012. Its totient is φ = 206117010.

The previous prime is 206116943. The next prime is 206117039. The reversal of 206117011 is 110711602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206117011 - 2¹¹ = 206114963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206117011.

It is not a weakly prime, because it can be changed into another prime (206117081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103058505 + 103058506.

It is an arithmetic number, because the mean of its divisors is an integer number (103058506).

Almost surely, 2^206117011 is an apocalyptic number.

206117011 is a deficient number, since it is larger than the sum of its proper divisors (1).

206117011 is an equidigital number, since it uses as much as digits as its factorization.

206117011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 206117011 is about 14356.7757870631. The cubic root of 206117011 is about 590.7058592056.

Adding to 206117011 its reverse (110711602), we get a palindrome (316828613).

The spelling of 206117011 in words is "two hundred six million, one hundred seventeen thousand, eleven".