2223222201221 has 4 divisors (see below), whose sum is σ = 2540825372832. Its totient is φ = 1905619029612.

The previous prime is 2223222201209. The next prime is 2223222201287. The reversal of 2223222201221 is 1221022223222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2223222201221 - 2¹⁴ = 2223222184837 is a prime.

It is a super-2 number, since 2×2223222201221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223222203221) 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 3 ways as a sum of consecutive naturals, for example, 158801585795 + ... + 158801585808.

It is an arithmetic number, because the mean of its divisors is an integer number (635206343208).

Almost surely, 2^{2223222201221} is an apocalyptic number.

It is an amenable number.

2223222201221 is a deficient number, since it is larger than the sum of its proper divisors (317603171611).

2223222201221 is an equidigital number, since it uses as much as digits as its factorization.

2223222201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317603171610.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 2223222201221 its reverse (1221022223222), we get a palindrome (3444244424443).

The spelling of 2223222201221 in words is "two trillion, two hundred twenty-three billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".