22022220001221 has 16 divisors (see below), whose sum is σ = 35591466669120. Its totient is φ = 13346800000560.

The previous prime is 22022220001211. The next prime is 22022220001247. The reversal of 22022220001221 is 12210002222022.

22022220001221 is a `hidden beast` number, since 2 + 20 + 222 + 200 + 0 + 1 + 221 = 666.

It is not a de Polignac number, because 22022220001221 - 2¹⁰ = 22022220000197 is a prime.

It is a super-2 number, since 2×22022220001221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22022220001194 and 22022220001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022220001211) 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 15 ways as a sum of consecutive naturals, for example, 37074444150 + ... + 37074444743.

It is an arithmetic number, because the mean of its divisors is an integer number (2224466666820).

Almost surely, 2^{22022220001221} is an apocalyptic number.

It is an amenable number.

22022220001221 is a deficient number, since it is larger than the sum of its proper divisors (13569246667899).

22022220001221 is a wasteful number, since it uses less digits than its factorization.

22022220001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74148888913 (or 74148888907 counting only the distinct ones).

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

Adding to 22022220001221 its reverse (12210002222022), we get a palindrome (34232222223243).

The spelling of 22022220001221 in words is "twenty-two trillion, twenty-two billion, two hundred twenty million, one thousand, two hundred twenty-one".