31121332232 has 32 divisors (see below), whose sum is σ = 59434477920. Its totient is φ = 15273793920.

The previous prime is 31121332133. The next prime is 31121332237. The reversal of 31121332232 is 23223312113.

It is a junction number, because it is equal to n+sod(n) for n = 31121332198 and 31121332207.

It is not an unprimeable number, because it can be changed into a prime (31121332237) 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, 47303 + ... + 253929.

It is an arithmetic number, because the mean of its divisors is an integer number (1857327435).

Almost surely, 2^31121332232 is an apocalyptic number.

It is an amenable number.

31121332232 is a deficient number, since it is larger than the sum of its proper divisors (28313145688).

31121332232 is a wasteful number, since it uses less digits than its factorization.

31121332232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206981 (or 206977 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

Adding to 31121332232 its reverse (23223312113), we get a palindrome (54344644345).

The spelling of 31121332232 in words is "thirty-one billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred thirty-two".