1222202212221 has 16 divisors (see below), whose sum is σ = 1658091548864. Its totient is φ = 800618442624.

The previous prime is 1222202212151. The next prime is 1222202212261. The reversal of 1222202212221 is 1222122022221.

It is not a de Polignac number, because 1222202212221 - 2¹⁸ = 1222201950077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222202212261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7578400 + ... + 7737993.

It is an arithmetic number, because the mean of its divisors is an integer number (103630721804).

Almost surely, 2^{1222202212221} is an apocalyptic number.

It is an amenable number.

1222202212221 is a deficient number, since it is larger than the sum of its proper divisors (435889336643).

1222202212221 is a wasteful number, since it uses less digits than its factorization.

1222202212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15316860.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1222202212221 its reverse (1222122022221), we get a palindrome (2444324234442).

The spelling of 1222202212221 in words is "one trillion, two hundred twenty-two billion, two hundred two million, two hundred twelve thousand, two hundred twenty-one".