331121330 has 16 divisors (see below), whose sum is σ = 610556184. Its totient is φ = 129217920.

The previous prime is 331121299. The next prime is 331121347. The reversal of 331121330 is 33121133.

It can be written as a sum of positive squares in 4 ways, for example, as 111281401 + 219839929 = 10549^2 + 14827^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331121299 and 331121308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403397 + ... + 404216.

Almost surely, 2^331121330 is an apocalyptic number.

331121330 is a deficient number, since it is larger than the sum of its proper divisors (279434854).

331121330 is a wasteful number, since it uses less digits than its factorization.

331121330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807661.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 331121330 is about 18196.7395431160. The cubic root of 331121330 is about 691.8241517495.

Adding to 331121330 its reverse (33121133), we get a palindrome (364242463).

The spelling of 331121330 in words is "three hundred thirty-one million, one hundred twenty-one thousand, three hundred thirty".