2143123312 has 20 divisors (see below), whose sum is σ = 4529783736. Its totient is φ = 974146880.

The previous prime is 2143123303. The next prime is 2143123337. The reversal of 2143123312 is 2133213412.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 6088243 + ... + 6088594.

Almost surely, 2^2143123312 is an apocalyptic number.

2143123312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2143123312 is an abundant number, since it is smaller than the sum of its proper divisors (2386660424).

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

2143123312 is a wasteful number, since it uses less digits than its factorization.

2143123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12176856 (or 12176850 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 2143123312 is about 46293.8798546849. The cubic root of 2143123312 is about 1289.2853666552.

Adding to 2143123312 its reverse (2133213412), we get a palindrome (4276336724).

The spelling of 2143123312 in words is "two billion, one hundred forty-three million, one hundred twenty-three thousand, three hundred twelve".