421321324243 has 2 divisors, whose sum is σ = 421321324244. Its totient is φ = 421321324242.

The previous prime is 421321324217. The next prime is 421321324271. The reversal of 421321324243 is 342423123124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421321324243 - 2⁵ = 421321324211 is a prime.

It is not a weakly prime, because it can be changed into another prime (421321324273) 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, 210660662121 + 210660662122.

It is an arithmetic number, because the mean of its divisors is an integer number (210660662122).

Almost surely, 2^421321324243 is an apocalyptic number.

421321324243 is a deficient number, since it is larger than the sum of its proper divisors (1).

421321324243 is an equidigital number, since it uses as much as digits as its factorization.

421321324243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 31.

Adding to 421321324243 its reverse (342423123124), we get a palindrome (763744447367).

The spelling of 421321324243 in words is "four hundred twenty-one billion, three hundred twenty-one million, three hundred twenty-four thousand, two hundred forty-three".