2131112412 has 144 divisors (see below), whose sum is σ = 6349045248. Its totient is φ = 594207360.

The previous prime is 2131112393. The next prime is 2131112413. The reversal of 2131112412 is 2142111312.

It is a super-2 number, since 2×2131112412² = 9083280225160915488, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131112413) 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 47 ways as a sum of consecutive naturals, for example, 2589033 + ... + 2589855.

It is an arithmetic number, because the mean of its divisors is an integer number (44090592).

Almost surely, 2^2131112412 is an apocalyptic number.

2131112412 is a gapful number since it is divisible by the number (22) 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 2131112412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3174522624).

2131112412 is an abundant number, since it is smaller than the sum of its proper divisors (4217932836).

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

2131112412 is a wasteful number, since it uses less digits than its factorization.

2131112412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1355 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 2131112412 is about 46163.9730959111. The cubic root of 2131112412 is about 1286.8723002020.

Adding to 2131112412 its reverse (2142111312), we get a palindrome (4273223724).

The spelling of 2131112412 in words is "two billion, one hundred thirty-one million, one hundred twelve thousand, four hundred twelve".