2131321312 has 48 divisors (see below), whose sum is σ = 4383886752. Its totient is φ = 1018068480.

The previous prime is 2131321279. The next prime is 2131321321. The reversal of 2131321312 is 2131231312.

It is a self number, because there is not a number n which added to its sum of digits gives 2131321312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909262 + ... + 911602.

It is an arithmetic number, because the mean of its divisors is an integer number (91330974).

Almost surely, 2^2131321312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131321312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2191943376).

2131321312 is an abundant number, since it is smaller than the sum of its proper divisors (2252565440).

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

2131321312 is a wasteful number, since it uses less digits than its factorization.

2131321312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611 (or 3603 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 2131321312 is about 46166.2356273500. The cubic root of 2131321312 is about 1286.9143469188.

Adding to 2131321312 its reverse (2131231312), we get a palindrome (4262552624).

Subtracting from 2131321312 its reverse (2131231312), we obtain a square (90000 = 300²).

The spelling of 2131321312 in words is "two billion, one hundred thirty-one million, three hundred twenty-one thousand, three hundred twelve".