33023000221 has 4 divisors (see below), whose sum is σ = 33040746844. Its totient is φ = 33005253600.

The previous prime is 33023000183. The next prime is 33023000233. The reversal of 33023000221 is 12200032033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12200032033 = 7 ⋅1742861719.

It can be written as a sum of positive squares in 2 ways, for example, as 1865808025 + 31157192196 = 43195^2 + 176514^2 .

It is a cyclic number.

It is not a de Polignac number, because 33023000221 - 2²³ = 33014611613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33023000195 and 33023000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33023000251) 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, 8870520 + ... + 8874241.

It is an arithmetic number, because the mean of its divisors is an integer number (8260186711).

Almost surely, 2^33023000221 is an apocalyptic number.

It is an amenable number.

33023000221 is a deficient number, since it is larger than the sum of its proper divisors (17746623).

33023000221 is a wasteful number, since it uses less digits than its factorization.

33023000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17746622.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 33023000221 its reverse (12200032033), we get a palindrome (45223032254).

The spelling of 33023000221 in words is "thirty-three billion, twenty-three million, two hundred twenty-one", and thus it is an aban number.