31121233232 has 20 divisors (see below), whose sum is σ = 60919014996. Its totient is φ = 15400197120.

The previous prime is 31121233189. The next prime is 31121233249. The reversal of 31121233232 is 23233212113.

It can be written as a sum of positive squares in 2 ways, for example, as 24635185936 + 6486047296 = 156956^2 + 80536^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31121233198 and 31121233207.

It is a congruent number.

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, 10024619 + ... + 10027722.

Almost surely, 2^31121233232 is an apocalyptic number.

It is an amenable number.

31121233232 is a deficient number, since it is larger than the sum of its proper divisors (29797781764).

31121233232 is a wasteful number, since it uses less digits than its factorization.

31121233232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20052446 (or 20052440 counting only the distinct ones).

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

Adding to 31121233232 its reverse (23233212113), we get a palindrome (54354445345).

The spelling of 31121233232 in words is "thirty-one billion, one hundred twenty-one million, two hundred thirty-three thousand, two hundred thirty-two".