331221033321232 has 20 divisors (see below), whose sum is σ = 641853953991180. Its totient is φ = 165581303259008.

The previous prime is 331221033321209. The next prime is 331221033321253. The reversal of 331221033321232 is 232123330122133.

It can be written as a sum of positive squares in 2 ways, for example, as 234135167778576 + 97085865542656 = 15301476^2 + 9853216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 331221033321194 and 331221033321203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1825744063 + ... + 1825925470.

It is an arithmetic number, because the mean of its divisors is an integer number (32092697699559).

Almost surely, 2^{331221033321232} is an apocalyptic number.

It is an amenable number.

331221033321232 is a deficient number, since it is larger than the sum of its proper divisors (310632920669948).

331221033321232 is a wasteful number, since it uses less digits than its factorization.

331221033321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651675210 (or 3651675204 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 31.

Adding to 331221033321232 its reverse (232123330122133), we get a palindrome (563344363443365).

The spelling of 331221033321232 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, thirty-three million, three hundred twenty-one thousand, two hundred thirty-two".