31200043122 has 96 divisors (see below), whose sum is σ = 71687161728. Its totient is φ = 9786974208.

The previous prime is 31200043109. The next prime is 31200043141. The reversal of 31200043122 is 22134000213.

31200043122 is a `hidden beast` number, since 31 + 200 + 0 + 431 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31200043095 and 31200043104.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 8829268 + ... + 8832800.

It is an arithmetic number, because the mean of its divisors is an integer number (746741268).

Almost surely, 2^31200043122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31200043122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35843580864).

31200043122 is an abundant number, since it is smaller than the sum of its proper divisors (40487118606).

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

31200043122 is a wasteful number, since it uses less digits than its factorization.

31200043122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904 (or 3901 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31200043122 its reverse (22134000213), we get a palindrome (53334043335).

The spelling of 31200043122 in words is "thirty-one billion, two hundred million, forty-three thousand, one hundred twenty-two".