202221002221 has 6 divisors (see below), whose sum is σ = 235236676110. Its totient is φ = 173332287576.

The previous prime is 202221002213. The next prime is 202221002227. The reversal of 202221002221 is 122200122202.

It can be written as a sum of positive squares in only one way, i.e., 147552015625 + 54668986596 = 384125^2 + 233814^2 .

It is not a de Polignac number, because 202221002221 - 2³ = 202221002213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202221002195 and 202221002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221002227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2063479566 + ... + 2063479663.

It is an arithmetic number, because the mean of its divisors is an integer number (39206112685).

Almost surely, 2^202221002221 is an apocalyptic number.

It is an amenable number.

202221002221 is a deficient number, since it is larger than the sum of its proper divisors (33015673889).

202221002221 is an equidigital number, since it uses as much as digits as its factorization.

202221002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126959243 (or 4126959236 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202221002221 its reverse (122200122202), we get a palindrome (324421124423).

The spelling of 202221002221 in words is "two hundred two billion, two hundred twenty-one million, two thousand, two hundred twenty-one".