6861210211 has 2 divisors, whose sum is σ = 6861210212. Its totient is φ = 6861210210.

The previous prime is 6861210163. The next prime is 6861210227. The reversal of 6861210211 is 1120121686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6861210211 - 2⁹ = 6861209699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6861210211.

It is not a weakly prime, because it can be changed into another prime (6861210271) 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, 3430605105 + 3430605106.

It is an arithmetic number, because the mean of its divisors is an integer number (3430605106).

Almost surely, 2^6861210211 is an apocalyptic number.

6861210211 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861210211 is an equidigital number, since it uses as much as digits as its factorization.

6861210211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 6861210211 is about 82832.4224624633. The cubic root of 6861210211 is about 1900.2040603546.

Adding to 6861210211 its reverse (1120121686), we get a palindrome (7981331897).

The spelling of 6861210211 in words is "six billion, eight hundred sixty-one million, two hundred ten thousand, two hundred eleven".