2213321221 has 4 divisors (see below), whose sum is σ = 2250835200. Its totient is φ = 2175807244.

The previous prime is 2213321219. The next prime is 2213321233. The reversal of 2213321221 is 1221233122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1221233122 = 2 ⋅610616561.

It is a cyclic number.

It is not a de Polignac number, because 2213321221 - 2¹ = 2213321219 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 (2213321251) 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, 18756901 + ... + 18757018.

It is an arithmetic number, because the mean of its divisors is an integer number (562708800).

Almost surely, 2^2213321221 is an apocalyptic number.

It is an amenable number.

2213321221 is a deficient number, since it is larger than the sum of its proper divisors (37513979).

2213321221 is an equidigital number, since it uses as much as digits as its factorization.

2213321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37513978.

The product of its digits is 288, while the sum is 19.

The square root of 2213321221 is about 47045.9479764198. The cubic root of 2213321221 is about 1303.2112368680.

Adding to 2213321221 its reverse (1221233122), we get a palindrome (3434554343).

The spelling of 2213321221 in words is "two billion, two hundred thirteen million, three hundred twenty-one thousand, two hundred twenty-one".