133021003 has 4 divisors (see below), whose sum is σ = 133252120. Its totient is φ = 132789888.

The previous prime is 133020997. The next prime is 133021013. The reversal of 133021003 is 300120331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133021003 - 2¹⁷ = 132889931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133021013) 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 3 ways as a sum of consecutive naturals, for example, 114693 + ... + 115846.

It is an arithmetic number, because the mean of its divisors is an integer number (33313030).

Almost surely, 2^133021003 is an apocalyptic number.

133021003 is a deficient number, since it is larger than the sum of its proper divisors (231117).

133021003 is an equidigital number, since it uses as much as digits as its factorization.

133021003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231116.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 133021003 is about 11533.4731542584. The cubic root of 133021003 is about 510.4737402487.

Adding to 133021003 its reverse (300120331), we get a palindrome (433141334).

The spelling of 133021003 in words is "one hundred thirty-three million, twenty-one thousand, three".