2123123412 has 36 divisors (see below), whose sum is σ = 5115901056. Its totient is φ = 684591840.

The previous prime is 2123123393. The next prime is 2123123413. The reversal of 2123123412 is 2143213212.

2123123412 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 (2123123413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 887514 + ... + 889902.

Almost surely, 2^2123123412 is an apocalyptic number.

It is an amenable number.

2123123412 is an abundant number, since it is smaller than the sum of its proper divisors (2992777644).

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

2123123412 is an equidigital number, since it uses as much as digits as its factorization.

2123123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4816 (or 2425 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 2123123412 is about 46077.3633360243. The cubic root of 2123123412 is about 1285.2622339751.

Adding to 2123123412 its reverse (2143213212), we get a palindrome (4266336624).

The spelling of 2123123412 in words is "two billion, one hundred twenty-three million, one hundred twenty-three thousand, four hundred twelve".