9820011211 has 2 divisors, whose sum is σ = 9820011212. Its totient is φ = 9820011210.

The previous prime is 9820011209. The next prime is 9820011241. The reversal of 9820011211 is 1121100289.

9820011211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1121100289) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9820011211 - 2¹ = 9820011209 is a prime.

Together with 9820011209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9820011241) 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, 4910005605 + 4910005606.

It is an arithmetic number, because the mean of its divisors is an integer number (4910005606).

Almost surely, 2^9820011211 is an apocalyptic number.

9820011211 is a deficient number, since it is larger than the sum of its proper divisors (1).

9820011211 is an equidigital number, since it uses as much as digits as its factorization.

9820011211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 9820011211 is about 99095.9697010933. The cubic root of 9820011211 is about 2141.4305521352.

The spelling of 9820011211 in words is "nine billion, eight hundred twenty million, eleven thousand, two hundred eleven".