331231121 has 8 divisors (see below), whose sum is σ = 361226880. Its totient is φ = 301880592.

The previous prime is 331231099. The next prime is 331231129. The reversal of 331231121 is 121132133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331231121 - 2⁶ = 331231057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 331231121.

It is not an unprimeable number, because it can be changed into a prime (331231129) 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 7 ways as a sum of consecutive naturals, for example, 160235 + ... + 162288.

It is an arithmetic number, because the mean of its divisors is an integer number (45153360).

Almost surely, 2^331231121 is an apocalyptic number.

It is an amenable number.

331231121 is a deficient number, since it is larger than the sum of its proper divisors (29995759).

331231121 is a wasteful number, since it uses less digits than its factorization.

331231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322615.

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

The square root of 331231121 is about 18199.7560697939. The cubic root of 331231121 is about 691.9006067778.

Adding to 331231121 its reverse (121132133), we get a palindrome (452363254).

The spelling of 331231121 in words is "three hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-one".