22333332221 has 4 divisors (see below), whose sum is σ = 22357168092. Its totient is φ = 22309496352.

The previous prime is 22333332199. The next prime is 22333332233. The reversal of 22333332221 is 12223333322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12223333322 = 2 ⋅6111666661.

It can be written as a sum of positive squares in 2 ways, for example, as 12385464100 + 9947868121 = 111290^2 + 99739^2 .

It is a cyclic number.

It is not a de Polignac number, because 22333332221 - 2³⁴ = 5153463037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22333332521) 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, 11916530 + ... + 11918403.

It is an arithmetic number, because the mean of its divisors is an integer number (5589292023).

Almost surely, 2^22333332221 is an apocalyptic number.

It is an amenable number.

22333332221 is a deficient number, since it is larger than the sum of its proper divisors (23835871).

22333332221 is an equidigital number, since it uses as much as digits as its factorization.

22333332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23835870.

The product of its digits is 7776, while the sum is 26.

Adding to 22333332221 its reverse (12223333322), we get a palindrome (34556665543).

The spelling of 22333332221 in words is "twenty-two billion, three hundred thirty-three million, three hundred thirty-two thousand, two hundred twenty-one".