21334312343 has 2 divisors, whose sum is σ = 21334312344. Its totient is φ = 21334312342.

The previous prime is 21334312327. The next prime is 21334312361. The reversal of 21334312343 is 34321343312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21334312343 - 2⁴ = 21334312327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334312543) 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, 10667156171 + 10667156172.

It is an arithmetic number, because the mean of its divisors is an integer number (10667156172).

Almost surely, 2^21334312343 is an apocalyptic number.

21334312343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334312343 is an equidigital number, since it uses as much as digits as its factorization.

21334312343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 29.

Adding to 21334312343 its reverse (34321343312), we get a palindrome (55655655655).

The spelling of 21334312343 in words is "twenty-one billion, three hundred thirty-four million, three hundred twelve thousand, three hundred forty-three".