2143123212 has 12 divisors (see below), whose sum is σ = 5000620856. Its totient is φ = 714374400.

The previous prime is 2143123193. The next prime is 2143123237. The reversal of 2143123212 is 2123213412.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89296789 + ... + 89296812.

Almost surely, 2^2143123212 is an apocalyptic number.

It is an amenable number.

2143123212 is an abundant number, since it is smaller than the sum of its proper divisors (2857497644).

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

2143123212 is a wasteful number, since it uses less digits than its factorization.

2143123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178593608 (or 178593606 counting only the distinct ones).

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

The square root of 2143123212 is about 46293.8787746285. The cubic root of 2143123212 is about 1289.2853466021.

Adding to 2143123212 its reverse (2123213412), we get a palindrome (4266336624).

The spelling of 2143123212 in words is "two billion, one hundred forty-three million, one hundred twenty-three thousand, two hundred twelve".