202221011210221 has 2 divisors, whose sum is σ = 202221011210222. Its totient is φ = 202221011210220.

The previous prime is 202221011210189. The next prime is 202221011210243. The reversal of 202221011210221 is 122012110122202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104863539284100 + 97357471926121 = 10240290^2 + 9866989^2 .

It is a cyclic number.

It is not a de Polignac number, because 202221011210221 - 2⁵ = 202221011210189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202221011610221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110505605110 + 101110505605111.

It is an arithmetic number, because the mean of its divisors is an integer number (101110505605111).

Almost surely, 2^{202221011210221} is an apocalyptic number.

It is an amenable number.

202221011210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221011210221 is an equidigital number, since it uses as much as digits as its factorization.

202221011210221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202221011210221 its reverse (122012110122202), we get a palindrome (324233121332423).

The spelling of 202221011210221 in words is "two hundred two trillion, two hundred twenty-one billion, eleven million, two hundred ten thousand, two hundred twenty-one".