10204320121 has 2 divisors, whose sum is σ = 10204320122. Its totient is φ = 10204320120.

The previous prime is 10204320059. The next prime is 10204320143. The reversal of 10204320121 is 12102340201.

10204320121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10167898896 + 36421225 = 100836^2 + 6035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10204320121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10204320095 and 10204320104.

It is not a weakly prime, because it can be changed into another prime (10204320151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5102160060 + 5102160061.

It is an arithmetic number, because the mean of its divisors is an integer number (5102160061).

Almost surely, 2^10204320121 is an apocalyptic number.

It is an amenable number.

10204320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10204320121 is an equidigital number, since it uses as much as digits as its factorization.

10204320121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 10204320121 its reverse (12102340201), we get a palindrome (22306660322).

The spelling of 10204320121 in words is "ten billion, two hundred four million, three hundred twenty thousand, one hundred twenty-one".