202010100221 has 2 divisors, whose sum is σ = 202010100222. Its totient is φ = 202010100220.

The previous prime is 202010100217. The next prime is 202010100239. The reversal of 202010100221 is 122001010202.

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., 111776548900 + 90233551321 = 334330^2 + 300389^2 .

It is a cyclic number.

It is not a de Polignac number, because 202010100221 - 2² = 202010100217 is a prime.

It is a super-3 number, since 3×202010100221³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202010100521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101005050110 + 101005050111.

It is an arithmetic number, because the mean of its divisors is an integer number (101005050111).

Almost surely, 2^202010100221 is an apocalyptic number.

It is an amenable number.

202010100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202010100221 is an equidigital number, since it uses as much as digits as its factorization.

202010100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202010100221 its reverse (122001010202), we get a palindrome (324011110423).

The spelling of 202010100221 in words is "two hundred two billion, ten million, one hundred thousand, two hundred twenty-one".