331243121 has 16 divisors (see below), whose sum is σ = 369102528. Its totient is φ = 294739200.

The previous prime is 331243097. The next prime is 331243183. The reversal of 331243121 is 121342133.

It is a cyclic number.

It is not a de Polignac number, because 331243121 - 2¹⁴ = 331226737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331243093 and 331243102.

It is not an unprimeable number, because it can be changed into a prime (331243021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108506 + ... + 111516.

It is an arithmetic number, because the mean of its divisors is an integer number (23068908).

Almost surely, 2^331243121 is an apocalyptic number.

It is an amenable number.

331243121 is a deficient number, since it is larger than the sum of its proper divisors (37859407).

331243121 is a wasteful number, since it uses less digits than its factorization.

331243121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232.

The product of its digits is 432, while the sum is 20.

The square root of 331243121 is about 18200.0857415563. The cubic root of 331243121 is about 691.9089621793.

Adding to 331243121 its reverse (121342133), we get a palindrome (452585254).

The spelling of 331243121 in words is "three hundred thirty-one million, two hundred forty-three thousand, one hundred twenty-one".