222011201221 has 8 divisors (see below), whose sum is σ = 222428671520. Its totient is φ = 221593912272.

The previous prime is 222011201219. The next prime is 222011201239. The reversal of 222011201221 is 122102110222.

It is a happy number.

222011201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222011201221 - 2¹ = 222011201219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222011201195 and 222011201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222011201261) 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 7 ways as a sum of consecutive naturals, for example, 2543326 + ... + 2629168.

It is an arithmetic number, because the mean of its divisors is an integer number (27803583940).

Almost surely, 2^222011201221 is an apocalyptic number.

It is an amenable number.

222011201221 is a deficient number, since it is larger than the sum of its proper divisors (417470299).

222011201221 is an equidigital number, since it uses as much as digits as its factorization.

222011201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90675.

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

Adding to 222011201221 its reverse (122102110222), we get a palindrome (344113311443).

Subtracting from 222011201221 its reverse (122102110222), we obtain a palindrome (99909090999).

The spelling of 222011201221 in words is "two hundred twenty-two billion, eleven million, two hundred one thousand, two hundred twenty-one".