21332443043 has 2 divisors, whose sum is σ = 21332443044. Its totient is φ = 21332443042.

The previous prime is 21332443003. The next prime is 21332443117. The reversal of 21332443043 is 34034423312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21332443043 - 2¹⁸ = 21332180899 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21332442997 and 21332443015.

It is not a weakly prime, because it can be changed into another prime (21332443003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666221521 + 10666221522.

It is an arithmetic number, because the mean of its divisors is an integer number (10666221522).

Almost surely, 2^21332443043 is an apocalyptic number.

21332443043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332443043 is an equidigital number, since it uses as much as digits as its factorization.

21332443043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 21332443043 its reverse (34034423312), we get a palindrome (55366866355).

The spelling of 21332443043 in words is "twenty-one billion, three hundred thirty-two million, four hundred forty-three thousand, forty-three".