206205011 has 2 divisors, whose sum is σ = 206205012. Its totient is φ = 206205010.

The previous prime is 206204989. The next prime is 206205017. The reversal of 206205011 is 110502602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206205011 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (206205017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103102505 + 103102506.

It is an arithmetic number, because the mean of its divisors is an integer number (103102506).

Almost surely, 2^206205011 is an apocalyptic number.

206205011 is a deficient number, since it is larger than the sum of its proper divisors (1).

206205011 is an equidigital number, since it uses as much as digits as its factorization.

206205011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 206205011 is about 14359.8402149885. The cubic root of 206205011 is about 590.7899129499.

Adding to 206205011 its reverse (110502602), we get a palindrome (316707613).

The spelling of 206205011 in words is "two hundred six million, two hundred five thousand, eleven".