331220120212 has 6 divisors (see below), whose sum is σ = 579635210378. Its totient is φ = 165610060104.

The previous prime is 331220120201. The next prime is 331220120227. The reversal of 331220120212 is 212021022133.

It can be written as a sum of positive squares in only one way, i.e., 273190200976 + 58029919236 = 522676^2 + 240894^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 331220120212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41402515023 + ... + 41402515030.

Almost surely, 2^331220120212 is an apocalyptic number.

It is an amenable number.

331220120212 is a deficient number, since it is larger than the sum of its proper divisors (248415090166).

331220120212 is a wasteful number, since it uses less digits than its factorization.

331220120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82805030057 (or 82805030055 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 331220120212 its reverse (212021022133), we get a palindrome (543241142345).

The spelling of 331220120212 in words is "three hundred thirty-one billion, two hundred twenty million, one hundred twenty thousand, two hundred twelve".