206340313121 has 2 divisors, whose sum is σ = 206340313122. Its totient is φ = 206340313120.

The previous prime is 206340313099. The next prime is 206340313141. The reversal of 206340313121 is 121313043602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206152321600 + 187991521 = 454040^2 + 13711^2 .

It is a cyclic number.

It is not a de Polignac number, because 206340313121 - 2²⁶ = 206273204257 is a prime.

It is not a weakly prime, because it can be changed into another prime (206340313141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103170156560 + 103170156561.

It is an arithmetic number, because the mean of its divisors is an integer number (103170156561).

Almost surely, 2^206340313121 is an apocalyptic number.

It is an amenable number.

206340313121 is a deficient number, since it is larger than the sum of its proper divisors (1).

206340313121 is an equidigital number, since it uses as much as digits as its factorization.

206340313121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 206340313121 its reverse (121313043602), we get a palindrome (327653356723).

The spelling of 206340313121 in words is "two hundred six billion, three hundred forty million, three hundred thirteen thousand, one hundred twenty-one".