321121133 has 4 divisors (see below), whose sum is σ = 321295548. Its totient is φ = 320946720.

The previous prime is 321121103. The next prime is 321121139. The reversal of 321121133 is 331121123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331121123 = 2089 ⋅158507.

It can be written as a sum of positive squares in 2 ways, for example, as 125037124 + 196084009 = 11182^2 + 14003^2 .

It is a cyclic number.

It is not a de Polignac number, because 321121133 - 2¹⁰ = 321120109 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 (321121139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84416 + ... + 88137.

It is an arithmetic number, because the mean of its divisors is an integer number (80323887).

Almost surely, 2^321121133 is an apocalyptic number.

It is an amenable number.

321121133 is a deficient number, since it is larger than the sum of its proper divisors (174415).

321121133 is a wasteful number, since it uses less digits than its factorization.

321121133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174414.

The product of its digits is 108, while the sum is 17.

The square root of 321121133 is about 17919.8530406920. The cubic root of 321121133 is about 684.7882436370.

Adding to 321121133 its reverse (331121123), we get a palindrome (652242256).

The spelling of 321121133 in words is "three hundred twenty-one million, one hundred twenty-one thousand, one hundred thirty-three".