205324121 has 4 divisors (see below), whose sum is σ = 205526244. Its totient is φ = 205122000.

The previous prime is 205324103. The next prime is 205324123. The reversal of 205324121 is 121423502.

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 58308496 + 147015625 = 7636^2 + 12125^2 .

It is a cyclic number.

It is not a de Polignac number, because 205324121 - 2⁶ = 205324057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205324093 and 205324102.

It is not an unprimeable number, because it can be changed into a prime (205324123) 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, 99530 + ... + 101571.

It is an arithmetic number, because the mean of its divisors is an integer number (51381561).

Almost surely, 2^205324121 is an apocalyptic number.

It is an amenable number.

205324121 is a deficient number, since it is larger than the sum of its proper divisors (202123).

205324121 is a wasteful number, since it uses less digits than its factorization.

205324121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202122.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 205324121 is about 14329.1353891294. The cubic root of 205324121 is about 589.9474443275.

Adding to 205324121 its reverse (121423502), we get a palindrome (326747623).

The spelling of 205324121 in words is "two hundred five million, three hundred twenty-four thousand, one hundred twenty-one".