21130320143 has 2 divisors, whose sum is σ = 21130320144. Its totient is φ = 21130320142.

The previous prime is 21130320061. The next prime is 21130320149. The reversal of 21130320143 is 34102303112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21130320143 - 2³⁰ = 20056578319 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130320149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565160071 + 10565160072.

It is an arithmetic number, because the mean of its divisors is an integer number (10565160072).

Almost surely, 2^21130320143 is an apocalyptic number.

21130320143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130320143 is an equidigital number, since it uses as much as digits as its factorization.

21130320143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21130320143 its reverse (34102303112), we get a palindrome (55232623255).

The spelling of 21130320143 in words is "twenty-one billion, one hundred thirty million, three hundred twenty thousand, one hundred forty-three".