331321220212 has 24 divisors (see below), whose sum is σ = 606643462656. Its totient is φ = 158033138208.

The previous prime is 331321220203. The next prime is 331321220303. The reversal of 331321220212 is 212022123133.

It is a congruent number.

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, 4793188 + ... + 4861819.

It is an arithmetic number, because the mean of its divisors is an integer number (25276810944).

Almost surely, 2^331321220212 is an apocalyptic number.

It is an amenable number.

331321220212 is a deficient number, since it is larger than the sum of its proper divisors (275322242444).

331321220212 is a wasteful number, since it uses less digits than its factorization.

331321220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9655407 (or 9655405 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 331321220212 its reverse (212022123133), we get a palindrome (543343343345).

The spelling of 331321220212 in words is "three hundred thirty-one billion, three hundred twenty-one million, two hundred twenty thousand, two hundred twelve".