21324404411 has 2 divisors, whose sum is σ = 21324404412. Its totient is φ = 21324404410.

The previous prime is 21324404399. The next prime is 21324404441. The reversal of 21324404411 is 11440442312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21324404411 - 2⁶ = 21324404347 is a prime.

It is not a weakly prime, because it can be changed into another prime (21324404441) 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, 10662202205 + 10662202206.

It is an arithmetic number, because the mean of its divisors is an integer number (10662202206).

Almost surely, 2^21324404411 is an apocalyptic number.

21324404411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21324404411 is an equidigital number, since it uses as much as digits as its factorization.

21324404411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21324404411 its reverse (11440442312), we get a palindrome (32764846723).

The spelling of 21324404411 in words is "twenty-one billion, three hundred twenty-four million, four hundred four thousand, four hundred eleven".