21143144312 has 32 divisors (see below), whose sum is σ = 41595634080. Its totient is φ = 10056055680.

The previous prime is 21143144299. The next prime is 21143144353. The reversal of 21143144312 is 21344134112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284123 + ... + 350730.

It is an arithmetic number, because the mean of its divisors is an integer number (1299863565).

Almost surely, 2^21143144312 is an apocalyptic number.

It is an amenable number.

21143144312 is a deficient number, since it is larger than the sum of its proper divisors (20452489768).

21143144312 is a wasteful number, since it uses less digits than its factorization.

21143144312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635063 (or 635059 counting only the distinct ones).

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

Adding to 21143144312 its reverse (21344134112), we get a palindrome (42487278424).

The spelling of 21143144312 in words is "twenty-one billion, one hundred forty-three million, one hundred forty-four thousand, three hundred twelve".