22120001201221 has 16 divisors (see below), whose sum is σ = 27661501122048. Its totient is φ = 17184290943600.

The previous prime is 22120001201197. The next prime is 22120001201239. The reversal of 22120001201221 is 12210210002122.

It is a happy number.

It is not a de Polignac number, because 22120001201221 - 2¹⁹ = 22120000676933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120001201195 and 22120001201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120001201281) 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, 433921255 + ... + 433972228.

It is an arithmetic number, because the mean of its divisors is an integer number (1728843820128).

Almost surely, 2^{22120001201221} is an apocalyptic number.

It is an amenable number.

22120001201221 is a deficient number, since it is larger than the sum of its proper divisors (5541499920827).

22120001201221 is a wasteful number, since it uses less digits than its factorization.

22120001201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867893832.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22120001201221 its reverse (12210210002122), we get a palindrome (34330211203343).

The spelling of 22120001201221 in words is "twenty-two trillion, one hundred twenty billion, one million, two hundred one thousand, two hundred twenty-one".