10202220121 has 2 divisors, whose sum is σ = 10202220122. Its totient is φ = 10202220120.

The previous prime is 10202220079. The next prime is 10202220131. The reversal of 10202220121 is 12102220201.

It is a happy number.

10202220121 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., 9967027225 + 235192896 = 99835^2 + 15336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10202220121 is a prime.

It is not a weakly prime, because it can be changed into another prime (10202220131) 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, 5101110060 + 5101110061.

It is an arithmetic number, because the mean of its divisors is an integer number (5101110061).

Almost surely, 2^10202220121 is an apocalyptic number.

It is an amenable number.

10202220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202220121 is an equidigital number, since it uses as much as digits as its factorization.

10202220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10202220121 its reverse (12102220201), we get a palindrome (22304440322).

The spelling of 10202220121 in words is "ten billion, two hundred two million, two hundred twenty thousand, one hundred twenty-one".