2222201321 has 4 divisors (see below), whose sum is σ = 2226309444. Its totient is φ = 2218093200.

The previous prime is 2222201309. The next prime is 2222201329. The reversal of 2222201321 is 1231022222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1161787225 + 1060414096 = 34085^2 + 32564^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222201321 - 2¹⁰ = 2222200297 is a prime.

It is a super-2 number, since 2×2222201321² = 9876357422108290082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2222201321.

It is not an unprimeable number, because it can be changed into a prime (2222201329) 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, 2053250 + ... + 2054331.

It is an arithmetic number, because the mean of its divisors is an integer number (556577361).

Almost surely, 2^2222201321 is an apocalyptic number.

It is an amenable number.

2222201321 is a deficient number, since it is larger than the sum of its proper divisors (4108123).

2222201321 is an equidigital number, since it uses as much as digits as its factorization.

2222201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108122.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2222201321 is about 47140.2303876424. The cubic root of 2222201321 is about 1304.9517891009.

Adding to 2222201321 its reverse (1231022222), we get a palindrome (3453223543).

The spelling of 2222201321 in words is "two billion, two hundred twenty-two million, two hundred one thousand, three hundred twenty-one".