206366121 has 12 divisors (see below), whose sum is σ = 321014148. Its totient is φ = 126994464.

The previous prime is 206366107. The next prime is 206366197. The reversal of 206366121 is 121663602.

206366121 is a `hidden beast` number, since 2 + 0 + 636 + 6 + 1 + 21 = 666.

206366121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 124010496 + 82355625 = 11136^2 + 9075^2 .

It is not a de Polignac number, because 206366121 - 2⁵ = 206366089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206366521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 881790 + ... + 882023.

It is an arithmetic number, because the mean of its divisors is an integer number (26751179).

Almost surely, 2^206366121 is an apocalyptic number.

It is an amenable number.

206366121 is a deficient number, since it is larger than the sum of its proper divisors (114648027).

206366121 is a wasteful number, since it uses less digits than its factorization.

206366121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763832 (or 1763829 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 206366121 is about 14365.4488617655. The cubic root of 206366121 is about 590.9437362158.

The spelling of 206366121 in words is "two hundred six million, three hundred sixty-six thousand, one hundred twenty-one".