208211808011 has 2 divisors, whose sum is σ = 208211808012. Its totient is φ = 208211808010.

The previous prime is 208211807983. The next prime is 208211808019. The reversal of 208211808011 is 110808112802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208211808011 is a prime.

It is a super-2 number, since 2×208211808011² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208211808019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104105904005 + 104105904006.

It is an arithmetic number, because the mean of its divisors is an integer number (104105904006).

Almost surely, 2^208211808011 is an apocalyptic number.

208211808011 is a deficient number, since it is larger than the sum of its proper divisors (1).

208211808011 is an equidigital number, since it uses as much as digits as its factorization.

208211808011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 32.

The spelling of 208211808011 in words is "two hundred eight billion, two hundred eleven million, eight hundred eight thousand, eleven".