211330021211 has 2 divisors, whose sum is σ = 211330021212. Its totient is φ = 211330021210.

The previous prime is 211330021159. The next prime is 211330021247. The reversal of 211330021211 is 112120033112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211330021211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211330021211.

It is not a weakly prime, because it can be changed into another prime (211330021271) 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, 105665010605 + 105665010606.

It is an arithmetic number, because the mean of its divisors is an integer number (105665010606).

Almost surely, 2^211330021211 is an apocalyptic number.

211330021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

211330021211 is an equidigital number, since it uses as much as digits as its factorization.

211330021211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211330021211 its reverse (112120033112), we get a palindrome (323450054323).

The spelling of 211330021211 in words is "two hundred eleven billion, three hundred thirty million, twenty-one thousand, two hundred eleven".