21024230434243 has 2 divisors, whose sum is σ = 21024230434244. Its totient is φ = 21024230434242.

The previous prime is 21024230434213. The next prime is 21024230434267. The reversal of 21024230434243 is 34243403242012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21024230434243 - 2²⁵ = 21024196879811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21024230434199 and 21024230434208.

It is not a weakly prime, because it can be changed into another prime (21024230434213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512115217121 + 10512115217122.

It is an arithmetic number, because the mean of its divisors is an integer number (10512115217122).

Almost surely, 2^{21024230434243} is an apocalyptic number.

21024230434243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21024230434243 is an equidigital number, since it uses as much as digits as its factorization.

21024230434243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 21024230434243 its reverse (34243403242012), we get a palindrome (55267633676255).

The spelling of 21024230434243 in words is "twenty-one trillion, twenty-four billion, two hundred thirty million, four hundred thirty-four thousand, two hundred forty-three".