22233032221 has 4 divisors (see below), whose sum is σ = 22319542332. Its totient is φ = 22146522112.

The previous prime is 22233032203. The next prime is 22233032243. The reversal of 22233032221 is 12223033222.

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 17209766596 + 5023265625 = 131186^2 + 70875^2 .

It is a cyclic number.

It is not a de Polignac number, because 22233032221 - 2⁵ = 22233032189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22233032192 and 22233032201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22233032251) 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, 43254670 + ... + 43255183.

It is an arithmetic number, because the mean of its divisors is an integer number (5579885583).

Almost surely, 2^22233032221 is an apocalyptic number.

It is an amenable number.

22233032221 is a deficient number, since it is larger than the sum of its proper divisors (86510111).

22233032221 is an equidigital number, since it uses as much as digits as its factorization.

22233032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86510110.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 22233032221 its reverse (12223033222), we get a palindrome (34456065443).

The spelling of 22233032221 in words is "twenty-two billion, two hundred thirty-three million, thirty-two thousand, two hundred twenty-one".