21230326404143 has 2 divisors, whose sum is σ = 21230326404144. Its totient is φ = 21230326404142.

The previous prime is 21230326404139. The next prime is 21230326404193. The reversal of 21230326404143 is 34140462303212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21230326404143 - 2² = 21230326404139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230326404193) 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 as a sum of consecutive naturals, namely, 10615163202071 + 10615163202072.

It is an arithmetic number, because the mean of its divisors is an integer number (10615163202072).

Almost surely, 2^{21230326404143} is an apocalyptic number.

21230326404143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230326404143 is an equidigital number, since it uses as much as digits as its factorization.

21230326404143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 21230326404143 its reverse (34140462303212), we get a palindrome (55370788707355).

The spelling of 21230326404143 in words is "twenty-one trillion, two hundred thirty billion, three hundred twenty-six million, four hundred four thousand, one hundred forty-three".