202221111002221 has 2 divisors, whose sum is σ = 202221111002222. Its totient is φ = 202221111002220.

The previous prime is 202221111002191. The next prime is 202221111002237. The reversal of 202221111002221 is 122200111122202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177675170365225 + 24545940636996 = 13329485^2 + 4954386^2 .

It is a cyclic number.

It is not a de Polignac number, because 202221111002221 - 2³⁹ = 201671355188333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202221111000221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110555501110 + 101110555501111.

It is an arithmetic number, because the mean of its divisors is an integer number (101110555501111).

Almost surely, 2^{202221111002221} is an apocalyptic number.

It is an amenable number.

202221111002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221111002221 is an equidigital number, since it uses as much as digits as its factorization.

202221111002221 is an evil number, because the sum of its binary digits is even.

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

Adding to 202221111002221 its reverse (122200111122202), we get a palindrome (324421222124423).

The spelling of 202221111002221 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred eleven million, two thousand, two hundred twenty-one".