206066121013 has 4 divisors (see below), whose sum is σ = 206180540428. Its totient is φ = 205951701600.

The previous prime is 206066120999. The next prime is 206066121017. The reversal of 206066121013 is 310121660602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30134529649 + 175931591364 = 173593^2 + 419442^2 .

It is a cyclic number.

It is not a de Polignac number, because 206066121013 - 2⁹ = 206066120501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206066121017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57207006 + ... + 57210607.

It is an arithmetic number, because the mean of its divisors is an integer number (51545135107).

Almost surely, 2^206066121013 is an apocalyptic number.

It is an amenable number.

206066121013 is a deficient number, since it is larger than the sum of its proper divisors (114419415).

206066121013 is a wasteful number, since it uses less digits than its factorization.

206066121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114419414.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 206066121013 its reverse (310121660602), we get a palindrome (516187781615).

The spelling of 206066121013 in words is "two hundred six billion, sixty-six million, one hundred twenty-one thousand, thirteen".