33001221 has 8 divisors (see below), whose sum is σ = 48001824. Its totient is φ = 20000720.

The previous prime is 33001219. The next prime is 33001247. The reversal of 33001221 is 12210033.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33001221 - 2¹ = 33001219 is a prime.

33001221 is a modest number, since divided by 1221 gives 33 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 33001197 and 33001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33001211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499986 + ... + 500051.

It is an arithmetic number, because the mean of its divisors is an integer number (6000228).

Almost surely, 2^33001221 is an apocalyptic number.

It is an amenable number.

33001221 is a deficient number, since it is larger than the sum of its proper divisors (15000603).

33001221 is a wasteful number, since it uses less digits than its factorization.

33001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000051.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 33001221 is about 5744.6689199640. The cubic root of 33001221 is about 320.7573889098.

Adding to 33001221 its reverse (12210033), we get a palindrome (45211254).

It can be divided in two parts, 330012 and 21, that added together give a palindrome (330033).

The spelling of 33001221 in words is "thirty-three million, one thousand, two hundred twenty-one".