21100403143 has 2 divisors, whose sum is σ = 21100403144. Its totient is φ = 21100403142.

The previous prime is 21100403131. The next prime is 21100403147. The reversal of 21100403143 is 34130400112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100403143 - 2¹⁷ = 21100272071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100403143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100403147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550201571 + 10550201572.

It is an arithmetic number, because the mean of its divisors is an integer number (10550201572).

Almost surely, 2^21100403143 is an apocalyptic number.

21100403143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100403143 is an equidigital number, since it uses as much as digits as its factorization.

21100403143 is an evil number, because the sum of its binary digits is even.

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

Adding to 21100403143 its reverse (34130400112), we get a palindrome (55230803255).

The spelling of 21100403143 in words is "twenty-one billion, one hundred million, four hundred three thousand, one hundred forty-three".