133221303 has 12 divisors (see below), whose sum is σ = 192789688. Its totient is φ = 88648560.

The previous prime is 133221301. The next prime is 133221307. The reversal of 133221303 is 303122331.

It is not a de Polignac number, because 133221303 - 2¹ = 133221301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133221301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8608 + ... + 18453.

Almost surely, 2^133221303 is an apocalyptic number.

133221303 is a deficient number, since it is larger than the sum of its proper divisors (59568385).

133221303 is a wasteful number, since it uses less digits than its factorization.

133221303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27614 (or 27611 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 133221303 is about 11542.1533086335. The cubic root of 133221303 is about 510.7298316676.

Adding to 133221303 its reverse (303122331), we get a palindrome (436343634).

The spelling of 133221303 in words is "one hundred thirty-three million, two hundred twenty-one thousand, three hundred three".