21334243811 has 2 divisors, whose sum is σ = 21334243812. Its totient is φ = 21334243810.

The previous prime is 21334243787. The next prime is 21334243871. The reversal of 21334243811 is 11834243312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21334243811 - 2⁶ = 21334243747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21334243871) 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, 10667121905 + 10667121906.

It is an arithmetic number, because the mean of its divisors is an integer number (10667121906).

Almost surely, 2^21334243811 is an apocalyptic number.

21334243811 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334243811 is an equidigital number, since it uses as much as digits as its factorization.

21334243811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The spelling of 21334243811 in words is "twenty-one billion, three hundred thirty-four million, two hundred forty-three thousand, eight hundred eleven".