2213321223221 has 4 divisors (see below), whose sum is σ = 2238190001100. Its totient is φ = 2188452445344.

The previous prime is 2213321223143. The next prime is 2213321223307. The reversal of 2213321223221 is 1223221233122.

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 749497090225 + 1463824132996 = 865735^2 + 1209886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213321223221 - 2¹⁰ = 2213321222197 is a prime.

It is a super-2 number, since 2×2213321223221² (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 (2213321223521) 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, 12434388806 + ... + 12434388983.

It is an arithmetic number, because the mean of its divisors is an integer number (559547500275).

Almost surely, 2^{2213321223221} is an apocalyptic number.

It is an amenable number.

2213321223221 is a deficient number, since it is larger than the sum of its proper divisors (24868777879).

2213321223221 is an equidigital number, since it uses as much as digits as its factorization.

2213321223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24868777878.

The product of its digits is 3456, while the sum is 26.

Adding to 2213321223221 its reverse (1223221233122), we get a palindrome (3436542456343).

Subtracting from 2213321223221 its reverse (1223221233122), we obtain a palindrome (990099990099).

The spelling of 2213321223221 in words is "two trillion, two hundred thirteen billion, three hundred twenty-one million, two hundred twenty-three thousand, two hundred twenty-one".