21100100143 has 2 divisors, whose sum is σ = 21100100144. Its totient is φ = 21100100142.

The previous prime is 21100100093. The next prime is 21100100173. The reversal of 21100100143 is 34100100112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100100143 - 2¹⁷ = 21099969071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100100173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550050071 + 10550050072.

It is an arithmetic number, because the mean of its divisors is an integer number (10550050072).

Almost surely, 2^21100100143 is an apocalyptic number.

21100100143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100100143 is an equidigital number, since it uses as much as digits as its factorization.

21100100143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21100100143 its reverse (34100100112), we get a palindrome (55200200255).

The spelling of 21100100143 in words is "twenty-one billion, one hundred million, one hundred thousand, one hundred forty-three".