33003001221 has 16 divisors (see below), whose sum is σ = 46685880000. Its totient is φ = 20666251008.

The previous prime is 33003001193. The next prime is 33003001223. The reversal of 33003001221 is 12210030033.

It is not a de Polignac number, because 33003001221 - 2¹⁰ = 33003000197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33003001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33003001223) 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 15 ways as a sum of consecutive naturals, for example, 622966 + ... + 673863.

It is an arithmetic number, because the mean of its divisors is an integer number (2917867500).

Almost surely, 2^33003001221 is an apocalyptic number.

It is an amenable number.

33003001221 is a deficient number, since it is larger than the sum of its proper divisors (13682878779).

33003001221 is a wasteful number, since it uses less digits than its factorization.

33003001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297348.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 33003001221 its reverse (12210030033), we get a palindrome (45213031254).

It can be divided in two parts, 330030012 and 21, that added together give a palindrome (330030033).

The spelling of 33003001221 in words is "thirty-three billion, three million, one thousand, two hundred twenty-one".