2222312221 has 4 divisors (see below), whose sum is σ = 2293999744. Its totient is φ = 2150624700.

The previous prime is 2222312201. The next prime is 2222312263. The reversal of 2222312221 is 1222132222.

2222312221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2222312221 - 2¹⁷ = 2222181149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222312201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35843715 + ... + 35843776.

It is an arithmetic number, because the mean of its divisors is an integer number (573499936).

Almost surely, 2^2222312221 is an apocalyptic number.

It is an amenable number.

2222312221 is a deficient number, since it is larger than the sum of its proper divisors (71687523).

2222312221 is an equidigital number, since it uses as much as digits as its factorization.

2222312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71687522.

The product of its digits is 384, while the sum is 19.

The square root of 2222312221 is about 47141.4066506293. The cubic root of 2222312221 is about 1304.9734968169.

Adding to 2222312221 its reverse (1222132222), we get a palindrome (3444444443).

The spelling of 2222312221 in words is "two billion, two hundred twenty-two million, three hundred twelve thousand, two hundred twenty-one".