33000033221 has 4 divisors (see below), whose sum is σ = 33011859744. Its totient is φ = 32988206700.

The previous prime is 33000033197. The next prime is 33000033251. The reversal of 33000033221 is 12233000033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12233000033 = 19 ⋅643842107.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33000033221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33000033221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33000033251) 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, 5909075 + ... + 5914656.

It is an arithmetic number, because the mean of its divisors is an integer number (8252964936).

Almost surely, 2^33000033221 is an apocalyptic number.

It is an amenable number.

33000033221 is a deficient number, since it is larger than the sum of its proper divisors (11826523).

33000033221 is a wasteful number, since it uses less digits than its factorization.

33000033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11826522.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 33000033221 its reverse (12233000033), we get a palindrome (45233033254).

The spelling of 33000033221 in words is "thirty-three billion, thirty-three thousand, two hundred twenty-one".