321131121 has 4 divisors (see below), whose sum is σ = 428174832. Its totient is φ = 214087412.

The previous prime is 321131117. The next prime is 321131171. The reversal of 321131121 is 121131123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121131123 = 3 ⋅40377041.

It is a cyclic number.

It is not a de Polignac number, because 321131121 - 2² = 321131117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321131121.

It is not an unprimeable number, because it can be changed into a prime (321131171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53521851 + ... + 53521856.

It is an arithmetic number, because the mean of its divisors is an integer number (107043708).

Almost surely, 2^321131121 is an apocalyptic number.

It is an amenable number.

321131121 is a deficient number, since it is larger than the sum of its proper divisors (107043711).

321131121 is a wasteful number, since it uses less digits than its factorization.

321131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107043710.

The product of its digits is 36, while the sum is 15.

The square root of 321131121 is about 17920.1317238462. The cubic root of 321131121 is about 684.7953433401.

Adding to 321131121 its reverse (121131123), we get a palindrome (442262244).

The spelling of 321131121 in words is "three hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty-one".