2112123412 has 24 divisors (see below), whose sum is σ = 4314127104. Its totient is φ = 885935712.

The previous prime is 2112123379. The next prime is 2112123421. The reversal of 2112123412 is 2143212112.

It is a super-2 number, since 2×2112123412² = 8922130615037043488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112123412.

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, 801163 + ... + 803794.

It is an arithmetic number, because the mean of its divisors is an integer number (179755296).

Almost surely, 2^2112123412 is an apocalyptic number.

It is an amenable number.

2112123412 is an abundant number, since it is smaller than the sum of its proper divisors (2202003692).

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

2112123412 is a wasteful number, since it uses less digits than its factorization.

2112123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605015 (or 1605013 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 2112123412 is about 45957.8438571698. The cubic root of 2112123412 is about 1283.0387219299.

Adding to 2112123412 its reverse (2143212112), we get a palindrome (4255335524).

The spelling of 2112123412 in words is "two billion, one hundred twelve million, one hundred twenty-three thousand, four hundred twelve".