206620107121 has 2 divisors, whose sum is σ = 206620107122. Its totient is φ = 206620107120.

The previous prime is 206620107061. The next prime is 206620107143. The reversal of 206620107121 is 121701026602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206502080625 + 118026496 = 454425^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 206620107121 - 2¹¹ = 206620105073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206620107121.

It is not a weakly prime, because it can be changed into another prime (206620107191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103310053560 + 103310053561.

It is an arithmetic number, because the mean of its divisors is an integer number (103310053561).

Almost surely, 2^206620107121 is an apocalyptic number.

It is an amenable number.

206620107121 is a deficient number, since it is larger than the sum of its proper divisors (1).

206620107121 is an equidigital number, since it uses as much as digits as its factorization.

206620107121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 206620107121 in words is "two hundred six billion, six hundred twenty million, one hundred seven thousand, one hundred twenty-one".