331211121 has 8 divisors (see below), whose sum is σ = 442881600. Its totient is φ = 220174032.

The previous prime is 331211077. The next prime is 331211129. The reversal of 331211121 is 121112133.

It is a happy number.

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

It is not a de Polignac number, because 331211121 - 2⁷ = 331210993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331211121.

It is not an unprimeable number, because it can be changed into a prime (331211129) 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, 157125 + ... + 159218.

It is an arithmetic number, because the mean of its divisors is an integer number (55360200).

Almost surely, 2^331211121 is an apocalyptic number.

It is an amenable number.

331211121 is a deficient number, since it is larger than the sum of its proper divisors (111670479).

331211121 is a wasteful number, since it uses less digits than its factorization.

331211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316695.

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

The square root of 331211121 is about 18199.2066035858. The cubic root of 331211121 is about 691.8866806602.

Adding to 331211121 its reverse (121112133), we get a palindrome (452323254).

It can be divided in two parts, 33 and 1211121, that multiplied together give a palindrome (39966993).

The spelling of 331211121 in words is "three hundred thirty-one million, two hundred eleven thousand, one hundred twenty-one".