1222202002221 has 16 divisors (see below), whose sum is σ = 1810711190400. Its totient is φ = 814782633984.

The previous prime is 1222202002187. The next prime is 1222202002283. The reversal of 1222202002221 is 1222002022221.

1222202002221 is a `hidden beast` number, since 1 + 22 + 220 + 200 + 2 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1222202002221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222202002194 and 1222202002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222202002421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733680 + ... + 1727046.

It is an arithmetic number, because the mean of its divisors is an integer number (113169449400).

Almost surely, 2^{1222202002221} is an apocalyptic number.

It is an amenable number.

1222202002221 is a deficient number, since it is larger than the sum of its proper divisors (588509188179).

1222202002221 is an equidigital number, since it uses as much as digits as its factorization.

1222202002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038945 (or 1038939 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1222202002221 its reverse (1222002022221), we get a palindrome (2444204024442).

The spelling of 1222202002221 in words is "one trillion, two hundred twenty-two billion, two hundred two million, two thousand, two hundred twenty-one".