2213320021 has 6 divisors (see below), whose sum is σ = 2432822966. Its totient is φ = 2012109000.

The previous prime is 2213320003. The next prime is 2213320027. The reversal of 2213320021 is 1200233122.

2213320021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2186591121 + 26728900 = 46761^2 + 5170^2 .

It is not a de Polignac number, because 2213320021 - 2⁷ = 2213319893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2213319977 and 2213320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213320027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9145830 + ... + 9146071.

Almost surely, 2^2213320021 is an apocalyptic number.

It is an amenable number.

2213320021 is a deficient number, since it is larger than the sum of its proper divisors (219502945).

2213320021 is a wasteful number, since it uses less digits than its factorization.

2213320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18291923 (or 18291912 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2213320021 is about 47045.9352229287. The cubic root of 2213320021 is about 1303.2110013466.

Adding to 2213320021 its reverse (1200233122), we get a palindrome (3413553143).

The spelling of 2213320021 in words is "two billion, two hundred thirteen million, three hundred twenty thousand, twenty-one".