222211313221 has 4 divisors (see below), whose sum is σ = 222212278252. Its totient is φ = 222210348192.

The previous prime is 222211313213. The next prime is 222211313227. The reversal of 222211313221 is 122313112222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 128174024196 + 94037289025 = 358014^2 + 306655^2 .

It is a cyclic number.

It is not a de Polignac number, because 222211313221 - 2³ = 222211313213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222211313192 and 222211313201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211313227) 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, 86755 + ... + 672271.

It is an arithmetic number, because the mean of its divisors is an integer number (55553069563).

Almost surely, 2^222211313221 is an apocalyptic number.

It is an amenable number.

222211313221 is a deficient number, since it is larger than the sum of its proper divisors (965031).

222211313221 is an equidigital number, since it uses as much as digits as its factorization.

222211313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965030.

The product of its digits is 576, while the sum is 22.

Adding to 222211313221 its reverse (122313112222), we get a palindrome (344524425443).

The spelling of 222211313221 in words is "two hundred twenty-two billion, two hundred eleven million, three hundred thirteen thousand, two hundred twenty-one".