21143204011 has 8 divisors (see below), whose sum is σ = 22409529984. Its totient is φ = 19879390080.

The previous prime is 21143203999. The next prime is 21143204057. The reversal of 21143204011 is 11040234112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21143204011 - 2⁵ = 21143203979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21143204011.

It is not an unprimeable number, because it can be changed into a prime (21143204081) 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 7 ways as a sum of consecutive naturals, for example, 610660 + ... + 644353.

It is an arithmetic number, because the mean of its divisors is an integer number (2801191248).

Almost surely, 2^21143204011 is an apocalyptic number.

21143204011 is a deficient number, since it is larger than the sum of its proper divisors (1266325973).

21143204011 is a wasteful number, since it uses less digits than its factorization.

21143204011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256021.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21143204011 its reverse (11040234112), we get a palindrome (32183438123).

The spelling of 21143204011 in words is "twenty-one billion, one hundred forty-three million, two hundred four thousand, eleven".