331131221132 has 12 divisors (see below), whose sum is σ = 579485138736. Its totient is φ = 165564038640.

The previous prime is 331131221129. The next prime is 331131221189. The reversal of 331131221132 is 231122131133.

It is a super-2 number, since 2×331131221132² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331131221098 and 331131221107.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 170882 + ... + 831542.

It is an arithmetic number, because the mean of its divisors is an integer number (48290428228).

Almost surely, 2^331131221132 is an apocalyptic number.

It is an amenable number.

331131221132 is a deficient number, since it is larger than the sum of its proper divisors (248353917604).

331131221132 is a wasteful number, since it uses less digits than its factorization.

331131221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785968 (or 785966 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

Adding to 331131221132 its reverse (231122131133), we get a palindrome (562253352265).

The spelling of 331131221132 in words is "three hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred thirty-two".