21104003143 has 2 divisors, whose sum is σ = 21104003144. Its totient is φ = 21104003142.

The previous prime is 21104003117. The next prime is 21104003183. The reversal of 21104003143 is 34130040112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21104003143 - 2⁵ = 21104003111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21104003143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21104003183) 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 as a sum of consecutive naturals, namely, 10552001571 + 10552001572.

It is an arithmetic number, because the mean of its divisors is an integer number (10552001572).

Almost surely, 2^21104003143 is an apocalyptic number.

21104003143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104003143 is an equidigital number, since it uses as much as digits as its factorization.

21104003143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21104003143 its reverse (34130040112), we get a palindrome (55234043255).

The spelling of 21104003143 in words is "twenty-one billion, one hundred four million, three thousand, one hundred forty-three".