206211011 has 2 divisors, whose sum is σ = 206211012. Its totient is φ = 206211010.

The previous prime is 206210989. The next prime is 206211013. The reversal of 206211011 is 110112602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206211011 - 2¹⁴ = 206194627 is a prime.

Together with 206211013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206211013) 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, 103105505 + 103105506.

It is an arithmetic number, because the mean of its divisors is an integer number (103105506).

Almost surely, 2^206211011 is an apocalyptic number.

206211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

206211011 is an equidigital number, since it uses as much as digits as its factorization.

206211011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 206211011 is about 14360.0491294424. The cubic root of 206211011 is about 590.7956430161.

Adding to 206211011 its reverse (110112602), we get a palindrome (316323613).

The spelling of 206211011 in words is "two hundred six million, two hundred eleven thousand, eleven".