31321132221332 has 48 divisors (see below), whose sum is σ = 58001505408000. Its totient is φ = 14757985751040.

The previous prime is 31321132221167. The next prime is 31321132221359. The reversal of 31321132221332 is 23312223112313.

It is a junction number, because it is equal to n+sod(n) for n = 31321132221295 and 31321132221304.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 502933748 + ... + 502996020.

It is an arithmetic number, because the mean of its divisors is an integer number (1208364696000).

Almost surely, 2^{31321132221332} is an apocalyptic number.

It is an amenable number.

31321132221332 is a deficient number, since it is larger than the sum of its proper divisors (26680373186668).

31321132221332 is a wasteful number, since it uses less digits than its factorization.

31321132221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97136 (or 97134 counting only the distinct ones).

The product of its digits is 7776, while the sum is 29.

Adding to 31321132221332 its reverse (23312223112313), we get a palindrome (54633355333645).

The spelling of 31321132221332 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred thirty-two million, two hundred twenty-one thousand, three hundred thirty-two".