205302121 has 2 divisors, whose sum is σ = 205302122. Its totient is φ = 205302120.

The previous prime is 205302113. The next prime is 205302133. The reversal of 205302121 is 121203502.

205302121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195692121 + 9610000 = 13989^2 + 3100^2 .

It is a cyclic number.

It is not a de Polignac number, because 205302121 - 2³ = 205302113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205302095 and 205302104.

It is not a weakly prime, because it can be changed into another prime (205302101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102651060 + 102651061.

It is an arithmetic number, because the mean of its divisors is an integer number (102651061).

Almost surely, 2^205302121 is an apocalyptic number.

It is an amenable number.

205302121 is a deficient number, since it is larger than the sum of its proper divisors (1).

205302121 is an equidigital number, since it uses as much as digits as its factorization.

205302121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 205302121 is about 14328.3677018703. The cubic root of 205302121 is about 589.9263730780.

Adding to 205302121 its reverse (121203502), we get a palindrome (326505623).

The spelling of 205302121 in words is "two hundred five million, three hundred two thousand, one hundred twenty-one".