33223130221 has 4 divisors (see below), whose sum is σ = 33223572252. Its totient is φ = 33222688192.

The previous prime is 33223130179. The next prime is 33223130231. The reversal of 33223130221 is 12203132233.

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 18487840900 + 14735289321 = 135970^2 + 121389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33223130221 is a prime.

It is a super-2 number, since 2×33223130221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33223130192 and 33223130201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33223130231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76990 + ... + 269023.

It is an arithmetic number, because the mean of its divisors is an integer number (8305893063).

Almost surely, 2^33223130221 is an apocalyptic number.

It is an amenable number.

33223130221 is a deficient number, since it is larger than the sum of its proper divisors (442031).

33223130221 is an equidigital number, since it uses as much as digits as its factorization.

33223130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442030.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33223130221 its reverse (12203132233), we get a palindrome (45426262454).

The spelling of 33223130221 in words is "thirty-three billion, two hundred twenty-three million, one hundred thirty thousand, two hundred twenty-one".