10210121 has 2 divisors, whose sum is σ = 10210122. Its totient is φ = 10210120.

The previous prime is 10210111. The next prime is 10210141. The reversal of 10210121 is 12101201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6446521 + 3763600 = 2539^2 + 1940^2 .

It is a cyclic number.

It is not a de Polignac number, because 10210121 - 2¹⁴ = 10193737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10210099 and 10210108.

It is not a weakly prime, because it can be changed into another prime (10210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105060 + 5105061.

It is an arithmetic number, because the mean of its divisors is an integer number (5105061).

Almost surely, 2^10210121 is an apocalyptic number.

It is an amenable number.

10210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10210121 is an equidigital number, since it uses as much as digits as its factorization.

10210121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 10210121 is about 3195.3279956837. The cubic root of 10210121 is about 216.9419950155.

Adding to 10210121 its reverse (12101201), we get a palindrome (22311322).

The spelling of 10210121 in words is "ten million, two hundred ten thousand, one hundred twenty-one".