21443143211 has 4 divisors (see below), whose sum is σ = 24506449392. Its totient is φ = 18379837032.

The previous prime is 21443143201. The next prime is 21443143229. The reversal of 21443143211 is 11234134412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21443143211 - 2¹⁰ = 21443142187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443143201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1531653080 + ... + 1531653093.

It is an arithmetic number, because the mean of its divisors is an integer number (6126612348).

Almost surely, 2^21443143211 is an apocalyptic number.

21443143211 is a deficient number, since it is larger than the sum of its proper divisors (3063306181).

21443143211 is an equidigital number, since it uses as much as digits as its factorization.

21443143211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063306180.

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

Adding to 21443143211 its reverse (11234134412), we get a palindrome (32677277623).

The spelling of 21443143211 in words is "twenty-one billion, four hundred forty-three million, one hundred forty-three thousand, two hundred eleven".