321112133 has 4 divisors (see below), whose sum is σ = 340001100. Its totient is φ = 302223168.

The previous prime is 321112093. The next prime is 321112151. The reversal of 321112133 is 331211123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331211123 = 383 ⋅864781.

It can be written as a sum of positive squares in 2 ways, for example, as 173659684 + 147452449 = 13178^2 + 12143^2 .

It is a cyclic number.

It is not a de Polignac number, because 321112133 - 2¹⁶ = 321046597 is a prime.

It is a super-2 number, since 2×321112133² = 206226003919619378, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 18888949 = 321112133 / (3 + 2 + 1 + 1 + 1 + 2 + 1 + 3 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321112153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9444458 + ... + 9444491.

It is an arithmetic number, because the mean of its divisors is an integer number (85000275).

Almost surely, 2^321112133 is an apocalyptic number.

It is an amenable number.

321112133 is a deficient number, since it is larger than the sum of its proper divisors (18888967).

321112133 is a wasteful number, since it uses less digits than its factorization.

321112133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18888966.

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

The square root of 321112133 is about 17919.6019208017. The cubic root of 321112133 is about 684.7818461013.

Adding to 321112133 its reverse (331211123), we get a palindrome (652323256).

The spelling of 321112133 in words is "three hundred twenty-one million, one hundred twelve thousand, one hundred thirty-three".