102020202000221 has 2 divisors, whose sum is σ = 102020202000222. Its totient is φ = 102020202000220.

The previous prime is 102020202000149. The next prime is 102020202000251. The reversal of 102020202000221 is 122000202020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64662264451225 + 37357937548996 = 8041285^2 + 6112114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102020202000221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020202000196 and 102020202000205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020202000251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010101000110 + 51010101000111.

It is an arithmetic number, because the mean of its divisors is an integer number (51010101000111).

Almost surely, 2^{102020202000221} is an apocalyptic number.

It is an amenable number.

102020202000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020202000221 is an equidigital number, since it uses as much as digits as its factorization.

102020202000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 102020202000221 its reverse (122000202020201), we get a palindrome (224020404020422).

The spelling of 102020202000221 in words is "one hundred two trillion, twenty billion, two hundred two million, two hundred twenty-one", and thus it is an aban number.