211210221011 has 2 divisors, whose sum is σ = 211210221012. Its totient is φ = 211210221010.

The previous prime is 211210220989. The next prime is 211210221017. The reversal of 211210221011 is 110122012112.

211210221011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211210221011 - 2¹⁸ = 211209958867 is a prime.

It is not a weakly prime, because it can be changed into another prime (211210221017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605110505 + 105605110506.

It is an arithmetic number, because the mean of its divisors is an integer number (105605110506).

Almost surely, 2^211210221011 is an apocalyptic number.

211210221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210221011 is an equidigital number, since it uses as much as digits as its factorization.

211210221011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211210221011 its reverse (110122012112), we get a palindrome (321332233123).

The spelling of 211210221011 in words is "two hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, eleven".