331121312 has 12 divisors (see below), whose sum is σ = 651895146. Its totient is φ = 165560640.

The previous prime is 331121299. The next prime is 331121347. The reversal of 331121312 is 213121133.

It can be written as a sum of positive squares in only one way, i.e., 331094416 + 26896 = 18196^2 + 164^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5173739 + ... + 5173802.

Almost surely, 2^331121312 is an apocalyptic number.

331121312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

331121312 is a deficient number, since it is larger than the sum of its proper divisors (320773834).

331121312 is a wasteful number, since it uses less digits than its factorization.

331121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347551 (or 10347543 counting only the distinct ones).

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

The square root of 331121312 is about 18196.7390485219. The cubic root of 331121312 is about 691.8241392135.

Adding to 331121312 its reverse (213121133), we get a palindrome (544242445).

The spelling of 331121312 in words is "three hundred thirty-one million, one hundred twenty-one thousand, three hundred twelve".