133321321 has 8 divisors (see below), whose sum is σ = 152743040. Its totient is φ = 113993568.

The previous prime is 133321319. The next prime is 133321333. The reversal of 133321321 is 123123331.

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 133321321 - 2¹ = 133321319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133321301) 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, 20421 + ... + 26146.

It is an arithmetic number, because the mean of its divisors is an integer number (19092880).

Almost surely, 2^133321321 is an apocalyptic number.

It is an amenable number.

133321321 is a deficient number, since it is larger than the sum of its proper divisors (19421719).

133321321 is an equidigital number, since it uses as much as digits as its factorization.

133321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46983.

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

The square root of 133321321 is about 11546.4852227853. The cubic root of 133321321 is about 510.8576125277.

Adding to 133321321 its reverse (123123331), we get a palindrome (256444652).

The spelling of 133321321 in words is "one hundred thirty-three million, three hundred twenty-one thousand, three hundred twenty-one".