2331312120 has 96 divisors (see below), whose sum is σ = 7672766400. Its totient is φ = 613806336.

The previous prime is 2331312097. The next prime is 2331312133. The reversal of 2331312120 is 212131332.

2331312120 is a `hidden beast` number, since 2 + 331 + 312 + 1 + 20 = 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 = 2331312093 and 2331312102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12547 + ... + 69426.

It is an arithmetic number, because the mean of its divisors is an integer number (79924650).

Almost surely, 2^2331312120 is an apocalyptic number.

2331312120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2331312120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3836383200).

2331312120 is an abundant number, since it is smaller than the sum of its proper divisors (5341454280).

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

2331312120 is a wasteful number, since it uses less digits than its factorization.

2331312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82069 (or 82062 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2331312120 is about 48283.6630756201. The cubic root of 2331312120 is about 1325.9693146875.

Adding to 2331312120 its reverse (212131332), we get a palindrome (2543443452).

The spelling of 2331312120 in words is "two billion, three hundred thirty-one million, three hundred twelve thousand, one hundred twenty".