331021221231 has 8 divisors (see below), whose sum is σ = 467324077104. Its totient is φ = 207699589760.

The previous prime is 331021221227. The next prime is 331021221277. The reversal of 331021221231 is 132122120133.

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

It is a cyclic number.

It is not a de Polignac number, because 331021221231 - 2² = 331021221227 is a prime.

It is a super-2 number, since 2×331021221231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331021221198 and 331021221207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331021221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3245306040 + ... + 3245306141.

It is an arithmetic number, because the mean of its divisors is an integer number (58415509638).

Almost surely, 2^331021221231 is an apocalyptic number.

331021221231 is a deficient number, since it is larger than the sum of its proper divisors (136302855873).

331021221231 is a wasteful number, since it uses less digits than its factorization.

331021221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490612201.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 331021221231 its reverse (132122120133), we get a palindrome (463143341364).

The spelling of 331021221231 in words is "three hundred thirty-one billion, twenty-one million, two hundred twenty-one thousand, two hundred thirty-one".