31122013332 has 24 divisors (see below), whose sum is σ = 72621715936. Its totient is φ = 10373478048.

The previous prime is 31122013289. The next prime is 31122013337. The reversal of 31122013332 is 23331022113.

It is a junction number, because it is equal to n+sod(n) for n = 31122013299 and 31122013308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122013337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235863 + ... + 343329.

Almost surely, 2^31122013332 is an apocalyptic number.

It is an amenable number.

31122013332 is an abundant number, since it is smaller than the sum of its proper divisors (41499702604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31122013332 is a wasteful number, since it uses less digits than its factorization.

31122013332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131607 (or 131605 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31122013332 its reverse (23331022113), we get a palindrome (54453035445).

The spelling of 31122013332 in words is "thirty-one billion, one hundred twenty-two million, thirteen thousand, three hundred thirty-two".