206610553594121 has 2 divisors, whose sum is σ = 206610553594122. Its totient is φ = 206610553594120.

The previous prime is 206610553594037. The next prime is 206610553594189. The reversal of 206610553594121 is 121495355016602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206072771905225 + 537781688896 = 14355235^2 + 733336^2 .

It is a cyclic number.

It is not a de Polignac number, because 206610553594121 - 2⁴² = 202212507083017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206610553594121.

It is not a weakly prime, because it can be changed into another prime (206610553594421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103305276797060 + 103305276797061.

It is an arithmetic number, because the mean of its divisors is an integer number (103305276797061).

Almost surely, 2^{206610553594121} is an apocalyptic number.

It is an amenable number.

206610553594121 is a deficient number, since it is larger than the sum of its proper divisors (1).

206610553594121 is an equidigital number, since it uses as much as digits as its factorization.

206610553594121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 206610553594121 in words is "two hundred six trillion, six hundred ten billion, five hundred fifty-three million, five hundred ninety-four thousand, one hundred twenty-one".