2221333221 has 8 divisors (see below), whose sum is σ = 3041825824. Its totient is φ = 1440864720.

The previous prime is 2221333217. The next prime is 2221333249. The reversal of 2221333221 is 1223331222.

It is a happy number.

2221333221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2221333221 - 2² = 2221333217 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 (2221333201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10005895 + ... + 10006116.

It is an arithmetic number, because the mean of its divisors is an integer number (380228228).

Almost surely, 2^2221333221 is an apocalyptic number.

It is an amenable number.

2221333221 is a deficient number, since it is larger than the sum of its proper divisors (820492603).

2221333221 is a wasteful number, since it uses less digits than its factorization.

2221333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20012051.

The product of its digits is 864, while the sum is 21.

The square root of 2221333221 is about 47131.0218539764. The cubic root of 2221333221 is about 1304.7818410735.

Adding to 2221333221 its reverse (1223331222), we get a palindrome (3444664443).

The spelling of 2221333221 in words is "two billion, two hundred twenty-one million, three hundred thirty-three thousand, two hundred twenty-one".