6816201121 has 2 divisors, whose sum is σ = 6816201122. Its totient is φ = 6816201120.

The previous prime is 6816201107. The next prime is 6816201127. The reversal of 6816201121 is 1211026186.

6816201121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4841376400 + 1974824721 = 69580^2 + 44439^2 .

It is a cyclic number.

It is not a de Polignac number, because 6816201121 - 2⁵ = 6816201089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6816201121.

It is not a weakly prime, because it can be changed into another prime (6816201127) 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, 3408100560 + 3408100561.

It is an arithmetic number, because the mean of its divisors is an integer number (3408100561).

Almost surely, 2^6816201121 is an apocalyptic number.

It is an amenable number.

6816201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6816201121 is an equidigital number, since it uses as much as digits as its factorization.

6816201121 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 6816201121 is about 82560.2877962523. The cubic root of 6816201121 is about 1896.0398700015.

The spelling of 6816201121 in words is "six billion, eight hundred sixteen million, two hundred one thousand, one hundred twenty-one".