21334324443911 has 2 divisors, whose sum is σ = 21334324443912. Its totient is φ = 21334324443910.

The previous prime is 21334324443907. The next prime is 21334324443947. The reversal of 21334324443911 is 11934442343312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21334324443911 - 2² = 21334324443907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334324442911) 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, 10667162221955 + 10667162221956.

It is an arithmetic number, because the mean of its divisors is an integer number (10667162221956).

Almost surely, 2^{21334324443911} is an apocalyptic number.

21334324443911 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334324443911 is an equidigital number, since it uses as much as digits as its factorization.

21334324443911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 44.

The spelling of 21334324443911 in words is "twenty-one trillion, three hundred thirty-four billion, three hundred twenty-four million, four hundred forty-three thousand, nine hundred eleven".