331121121 has 8 divisors (see below), whose sum is σ = 467465184. Its totient is φ = 207762240.

The previous prime is 331121117. The next prime is 331121129. The reversal of 331121121 is 121121133.

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 331121121 - 2² = 331121117 is a prime.

It is a super-3 number, since 3×331121121³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331121121.

It is not an unprimeable number, because it can be changed into a prime (331121129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3246235 + ... + 3246336.

It is an arithmetic number, because the mean of its divisors is an integer number (58433148).

Almost surely, 2^331121121 is an apocalyptic number.

It is an amenable number.

331121121 is a deficient number, since it is larger than the sum of its proper divisors (136344063).

331121121 is a wasteful number, since it uses less digits than its factorization.

331121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492591.

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

The square root of 331121121 is about 18196.7338003280. The cubic root of 331121121 is about 691.8240061923.

Adding to 331121121 its reverse (121121133), we get a palindrome (452242254).

The spelling of 331121121 in words is "three hundred thirty-one million, one hundred twenty-one thousand, one hundred twenty-one".