205044121 has 8 divisors (see below), whose sum is σ = 214561224. Its totient is φ = 195736320.

The previous prime is 205044097. The next prime is 205044139. The reversal of 205044121 is 121440502.

205044121 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 4 ways, for example, as 67240000 + 137804121 = 8200^2 + 11739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205044121 - 2¹¹ = 205042073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205047121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50320 + ... + 54241.

It is an arithmetic number, because the mean of its divisors is an integer number (26820153).

Almost surely, 2^205044121 is an apocalyptic number.

It is an amenable number.

205044121 is a deficient number, since it is larger than the sum of its proper divisors (9517103).

205044121 is a wasteful number, since it uses less digits than its factorization.

205044121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104651.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 205044121 is about 14319.3617525363. The cubic root of 205044121 is about 589.6791523734.

Adding to 205044121 its reverse (121440502), we get a palindrome (326484623).

The spelling of 205044121 in words is "two hundred five million, forty-four thousand, one hundred twenty-one".