133133221 has 8 divisors (see below), whose sum is σ = 145515104. Its totient is φ = 121057200.

The previous prime is 133133213. The next prime is 133133233. The reversal of 133133221 is 122331331.

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 133133221 - 2³ = 133133213 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 (133133201) 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 7 ways as a sum of consecutive naturals, for example, 75555 + ... + 77296.

It is an arithmetic number, because the mean of its divisors is an integer number (18189388).

Almost surely, 2^133133221 is an apocalyptic number.

It is an amenable number.

133133221 is a deficient number, since it is larger than the sum of its proper divisors (12381883).

133133221 is a wasteful number, since it uses less digits than its factorization.

133133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152931.

The product of its digits is 324, while the sum is 19.

The square root of 133133221 is about 11538.3370118921. The cubic root of 133133221 is about 510.6172470129.

Adding to 133133221 its reverse (122331331), we get a palindrome (255464552).

The spelling of 133133221 in words is "one hundred thirty-three million, one hundred thirty-three thousand, two hundred twenty-one".