133021 has 8 divisors (see below), whose sum is σ = 157184. Its totient is φ = 110160.

The previous prime is 133013. The next prime is 133033. The reversal of 133021 is 120331.

133021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 133021 - 2³ = 133013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 132989 and 133007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133051) 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, 90 + ... + 523.

It is an arithmetic number, because the mean of its divisors is an integer number (19648).

2¹³³⁰²¹ is an apocalyptic number.

It is an amenable number.

133021 is a deficient number, since it is larger than the sum of its proper divisors (24163).

133021 is an equidigital number, since it uses as much as digits as its factorization.

133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 133021 is about 364.7204408859. The cubic root of 133021 is about 51.0473736411.

Adding to 133021 its reverse (120331), we get a palindrome (253352).

The spelling of 133021 in words is "one hundred thirty-three thousand, twenty-one".