2143123412 has 12 divisors (see below), whose sum is σ = 3795652896. Its totient is φ = 1058651160.

The previous prime is 2143123387. The next prime is 2143123421. The reversal of 2143123412 is 2143213412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3227264 + ... + 3227927.

It is an arithmetic number, because the mean of its divisors is an integer number (316304408).

Almost surely, 2^2143123412 is an apocalyptic number.

It is an amenable number.

2143123412 is a deficient number, since it is larger than the sum of its proper divisors (1652529484).

2143123412 is a wasteful number, since it uses less digits than its factorization.

2143123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6455278 (or 6455276 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 2143123412 is about 46293.8809347413. The cubic root of 2143123412 is about 1289.2853867083.

Adding to 2143123412 its reverse (2143213412), we get a palindrome (4286336824).

Subtracting 2143123412 from its reverse (2143213412), we obtain a square (90000 = 300²).

The spelling of 2143123412 in words is "two billion, one hundred forty-three million, one hundred twenty-three thousand, four hundred twelve".