206166025103123 has 2 divisors, whose sum is σ = 206166025103124. Its totient is φ = 206166025103122.

The previous prime is 206166025103107. The next prime is 206166025103161. The reversal of 206166025103123 is 321301520661602.

It is an a-pointer prime, because the next prime (206166025103161) can be obtained adding 206166025103123 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206166025103123 - 2⁴ = 206166025103107 is a prime.

It is not a weakly prime, because it can be changed into another prime (206166025603123) 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, 103083012551561 + 103083012551562.

It is an arithmetic number, because the mean of its divisors is an integer number (103083012551562).

Almost surely, 2^{206166025103123} is an apocalyptic number.

206166025103123 is a deficient number, since it is larger than the sum of its proper divisors (1).

206166025103123 is an equidigital number, since it uses as much as digits as its factorization.

206166025103123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 206166025103123 its reverse (321301520661602), we get a palindrome (527467545764725).

The spelling of 206166025103123 in words is "two hundred six trillion, one hundred sixty-six billion, twenty-five million, one hundred three thousand, one hundred twenty-three".