222202201211221 has 12 divisors (see below), whose sum is σ = 281978303578560. Its totient is φ = 173144572371960.

The previous prime is 222202201211167. The next prime is 222202201211227. The reversal of 222202201211221 is 122112102202222.

It is not a de Polignac number, because 222202201211221 - 2¹¹ = 222202201209173 is a prime.

It is a super-2 number, since 2×222202201211221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222202201211192 and 222202201211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202201211227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206124490381 + ... + 206124491458.

It is an arithmetic number, because the mean of its divisors is an integer number (23498191964880).

Almost surely, 2^{222202201211221} is an apocalyptic number.

It is an amenable number.

222202201211221 is a deficient number, since it is larger than the sum of its proper divisors (59776102367339).

222202201211221 is a wasteful number, since it uses less digits than its factorization.

222202201211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412248981864 (or 412248981857 counting only the distinct ones).

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

Adding to 222202201211221 its reverse (122112102202222), we get a palindrome (344314303413443).

The spelling of 222202201211221 in words is "two hundred twenty-two trillion, two hundred two billion, two hundred one million, two hundred eleven thousand, two hundred twenty-one".