202002101221 has 2 divisors, whose sum is σ = 202002101222. Its totient is φ = 202002101220.

The previous prime is 202002101201. The next prime is 202002101227. The reversal of 202002101221 is 122101200202.

It is a happy number.

202002101221 is digitally balanced in base 2, 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., 174937245025 + 27064856196 = 418255^2 + 164514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202002101221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202002101227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101001050610 + 101001050611.

It is an arithmetic number, because the mean of its divisors is an integer number (101001050611).

Almost surely, 2^202002101221 is an apocalyptic number.

It is an amenable number.

202002101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202002101221 is an equidigital number, since it uses as much as digits as its factorization.

202002101221 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 202002101221 its reverse (122101200202), we get a palindrome (324103301423).

The spelling of 202002101221 in words is "two hundred two billion, two million, one hundred one thousand, two hundred twenty-one".