221202212102221 has 12 divisors (see below), whose sum is σ = 257370478099200. Its totient is φ = 189562387260120.

The previous prime is 221202212102219. The next prime is 221202212102273. The reversal of 221202212102221 is 122201212202122.

It is not a de Polignac number, because 221202212102221 - 2¹ = 221202212102219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221202212102192 and 221202212102201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202212105221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 470105635 + ... + 470575936.

It is an arithmetic number, because the mean of its divisors is an integer number (21447539841600).

Almost surely, 2^{221202212102221} is an apocalyptic number.

It is an amenable number.

221202212102221 is a deficient number, since it is larger than the sum of its proper divisors (36168265996979).

221202212102221 is an equidigital number, since it uses as much as digits as its factorization.

221202212102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940686384 (or 940686377 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221202212102221 its reverse (122201212202122), we get a palindrome (343403424304343).

Subtracting from 221202212102221 its reverse (122201212202122), we obtain a palindrome (99000999900099).

The spelling of 221202212102221 in words is "two hundred twenty-one trillion, two hundred two billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".