21143033211 has 4 divisors (see below), whose sum is σ = 28190710952. Its totient is φ = 14095355472.

The previous prime is 21143033209. The next prime is 21143033243. The reversal of 21143033211 is 11233034112.

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

It is not a de Polignac number, because 21143033211 - 2¹ = 21143033209 is a prime.

It is a super-2 number, since 2×21143033211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21143033111) 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, 3523838866 + ... + 3523838871.

It is an arithmetic number, because the mean of its divisors is an integer number (7047677738).

Almost surely, 2^21143033211 is an apocalyptic number.

21143033211 is a deficient number, since it is larger than the sum of its proper divisors (7047677741).

21143033211 is an equidigital number, since it uses as much as digits as its factorization.

21143033211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047677740.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21143033211 its reverse (11233034112), we get a palindrome (32376067323).

Subtracting from 21143033211 its reverse (11233034112), we obtain a palindrome (9909999099).

The spelling of 21143033211 in words is "twenty-one billion, one hundred forty-three million, thirty-three thousand, two hundred eleven".