21143143124 has 12 divisors (see below), whose sum is σ = 37031680224. Its totient is φ = 10562663064.

The previous prime is 21143143103. The next prime is 21143143127. The reversal of 21143143124 is 42134134112.

It is a junction number, because it is equal to n+sod(n) for n = 21143143093 and 21143143102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143143127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221784 + ... + 2231279.

It is an arithmetic number, because the mean of its divisors is an integer number (3085973352).

Almost surely, 2^21143143124 is an apocalyptic number.

It is an amenable number.

21143143124 is a deficient number, since it is larger than the sum of its proper divisors (15888537100).

21143143124 is a wasteful number, since it uses less digits than its factorization.

21143143124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454254 (or 4454252 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

Adding to 21143143124 its reverse (42134134112), we get a palindrome (63277277236).

The spelling of 21143143124 in words is "twenty-one billion, one hundred forty-three million, one hundred forty-three thousand, one hundred twenty-four".