1222204022221 has 24 divisors (see below), whose sum is σ = 1531217466240. Its totient is φ = 966952419552.

The previous prime is 1222204022209. The next prime is 1222204022239.

1222204022221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1222204022221 - 2⁵ = 1222204022189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222204022192 and 1222204022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222204022261) 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 23 ways as a sum of consecutive naturals, for example, 10618240 + ... + 10732726.

It is an arithmetic number, because the mean of its divisors is an integer number (63800727760).

Almost surely, 2^{1222204022221} is an apocalyptic number.

It is an amenable number.

1222204022221 is a deficient number, since it is larger than the sum of its proper divisors (309013444019).

1222204022221 is a wasteful number, since it uses less digits than its factorization.

1222204022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131273 (or 131266 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Multiplying 1222204022221 by its sum of digits (22), we get a palindrome (26888488488862).

The spelling of 1222204022221 in words is "one trillion, two hundred twenty-two billion, two hundred four million, twenty-two thousand, two hundred twenty-one".