21433440322243 has 2 divisors, whose sum is σ = 21433440322244. Its totient is φ = 21433440322242.

The previous prime is 21433440322223. The next prime is 21433440322271. The reversal of 21433440322243 is 34222304433412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21433440322243 - 2¹³ = 21433440314051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21433440322223) 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, 10716720161121 + 10716720161122.

It is an arithmetic number, because the mean of its divisors is an integer number (10716720161122).

Almost surely, 2^{21433440322243} is an apocalyptic number.

21433440322243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433440322243 is an equidigital number, since it uses as much as digits as its factorization.

21433440322243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 21433440322243 its reverse (34222304433412), we get a palindrome (55655744755655).

The spelling of 21433440322243 in words is "twenty-one trillion, four hundred thirty-three billion, four hundred forty million, three hundred twenty-two thousand, two hundred forty-three".