10210120121 has 2 divisors, whose sum is σ = 10210120122. Its totient is φ = 10210120120.

The previous prime is 10210120099. The next prime is 10210120127. The reversal of 10210120121 is 12102101201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6755031721 + 3455088400 = 82189^2 + 58780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10210120121 is a prime.

It is not a weakly prime, because it can be changed into another prime (10210120127) 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, 5105060060 + 5105060061.

It is an arithmetic number, because the mean of its divisors is an integer number (5105060061).

Almost surely, 2^10210120121 is an apocalyptic number.

It is an amenable number.

10210120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10210120121 is an equidigital number, since it uses as much as digits as its factorization.

10210120121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10210120121 its reverse (12102101201), we get a palindrome (22312221322).

The spelling of 10210120121 in words is "ten billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".