331221312231 has 8 divisors (see below), whose sum is σ = 452399841264. Its totient is φ = 215428495680.

The previous prime is 331221312221. The next prime is 331221312239. The reversal of 331221312231 is 132213122133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331221312231 - 2⁹ = 331221311719 is a prime.

It is a super-3 number, since 3×331221312231³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331221312239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346427976 + ... + 1346428221.

It is an arithmetic number, because the mean of its divisors is an integer number (56549980158).

Almost surely, 2^331221312231 is an apocalyptic number.

331221312231 is a deficient number, since it is larger than the sum of its proper divisors (121178529033).

331221312231 is a wasteful number, since it uses less digits than its factorization.

331221312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692856241.

The product of its digits is 1296, while the sum is 24.

Adding to 331221312231 its reverse (132213122133), we get a palindrome (463434434364).

The spelling of 331221312231 in words is "three hundred thirty-one billion, two hundred twenty-one million, three hundred twelve thousand, two hundred thirty-one".