10002020220121 has 2 divisors, whose sum is σ = 10002020220122. Its totient is φ = 10002020220120.

The previous prime is 10002020220067. The next prime is 10002020220209. The reversal of 10002020220121 is 12102202020001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5264106164496 + 4737914055625 = 2294364^2 + 2176675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10002020220121 is a prime.

It is not a weakly prime, because it can be changed into another prime (10002020221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001010110060 + 5001010110061.

It is an arithmetic number, because the mean of its divisors is an integer number (5001010110061).

Almost surely, 2^{10002020220121} is an apocalyptic number.

It is an amenable number.

10002020220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002020220121 is an equidigital number, since it uses as much as digits as its factorization.

10002020220121 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 10002020220121 its reverse (12102202020001), we get a palindrome (22104222240122).

The spelling of 10002020220121 in words is "ten trillion, two billion, twenty million, two hundred twenty thousand, one hundred twenty-one".