331121321232220 has 24 divisors (see below), whose sum is σ = 695355538301424. Its totient is φ = 132448383023616.

The previous prime is 331121321232197. The next prime is 331121321232259. The reversal of 331121321232220 is 22232123121133.

It is a super-2 number, since 2×331121321232220² (a number of 30 digits) contains 22 as substring.

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, 10615087 + ... + 27837433.

It is an arithmetic number, because the mean of its divisors is an integer number (28973147429226).

Almost surely, 2^{331121321232220} is an apocalyptic number.

It is an amenable number.

331121321232220 is an abundant number, since it is smaller than the sum of its proper divisors (364234217069204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331121321232220 is a wasteful number, since it uses less digits than its factorization.

331121321232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18183669 (or 18183667 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 331121321232220 its reverse (22232123121133), we get a palindrome (353353444353353).

The spelling of 331121321232220 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty".