2131320120 has 64 divisors (see below), whose sum is σ = 6450585120. Its totient is φ = 563318784.

The previous prime is 2131320119. The next prime is 2131320127. The reversal of 2131320120 is 210231312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2131320120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131320127) 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 15 ways as a sum of consecutive naturals, for example, 65029 + ... + 92148.

Almost surely, 2^2131320120 is an apocalyptic number.

2131320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131320120 is an abundant number, since it is smaller than the sum of its proper divisors (4319265000).

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

2131320120 is a wasteful number, since it uses less digits than its factorization.

2131320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157304 (or 157300 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2131320120 is about 46166.2227174804. Note that the first 3 decimals coincide. The cubic root of 2131320120 is about 1286.9141070047.

Adding to 2131320120 its reverse (210231312), we get a palindrome (2341551432).

The spelling of 2131320120 in words is "two billion, one hundred thirty-one million, three hundred twenty thousand, one hundred twenty".