323131121 has 4 divisors (see below), whose sum is σ = 342138852. Its totient is φ = 304123392.

The previous prime is 323131103. The next prime is 323131129. The reversal of 323131121 is 121131323.

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

It can be written as a sum of positive squares in 2 ways, for example, as 105863521 + 217267600 = 10289^2 + 14740^2 .

It is a cyclic number.

It is not a de Polignac number, because 323131121 - 2⁶ = 323131057 is a prime.

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: 19007713 = 323131121 / (3 + 2 + 3 + 1 + 3 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 323131121.

It is not an unprimeable number, because it can be changed into a prime (323131129) 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, 9503840 + ... + 9503873.

It is an arithmetic number, because the mean of its divisors is an integer number (85534713).

Almost surely, 2^323131121 is an apocalyptic number.

It is an amenable number.

323131121 is a deficient number, since it is larger than the sum of its proper divisors (19007731).

323131121 is a wasteful number, since it uses less digits than its factorization.

323131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19007730.

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

The square root of 323131121 is about 17975.8482692751. The cubic root of 323131121 is about 686.2140340561.

Adding to 323131121 its reverse (121131323), we get a palindrome (444262444).

The spelling of 323131121 in words is "three hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty-one".