201002201221 has 2 divisors, whose sum is σ = 201002201222. Its totient is φ = 201002201220.

The previous prime is 201002201209. The next prime is 201002201273. The reversal of 201002201221 is 122102200102.

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., 168966213025 + 32035988196 = 411055^2 + 178986^2 .

It is a cyclic number.

It is not a de Polignac number, because 201002201221 - 2⁵ = 201002201189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201002201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100501100610 + 100501100611.

It is an arithmetic number, because the mean of its divisors is an integer number (100501100611).

Almost surely, 2^201002201221 is an apocalyptic number.

It is an amenable number.

201002201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201002201221 is an equidigital number, since it uses as much as digits as its factorization.

201002201221 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 201002201221 its reverse (122102200102), we get a palindrome (323104401323).

The spelling of 201002201221 in words is "two hundred one billion, two million, two hundred one thousand, two hundred twenty-one".