21334245211 has 2 divisors, whose sum is σ = 21334245212. Its totient is φ = 21334245210.

The previous prime is 21334245173. The next prime is 21334245227. The reversal of 21334245211 is 11254243312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21334245211 - 2⁷ = 21334245083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21334245211.

It is not a weakly prime, because it can be changed into another prime (21334245271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667122605 + 10667122606.

It is an arithmetic number, because the mean of its divisors is an integer number (10667122606).

Almost surely, 2^21334245211 is an apocalyptic number.

21334245211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334245211 is an equidigital number, since it uses as much as digits as its factorization.

21334245211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

Adding to 21334245211 its reverse (11254243312), we get a palindrome (32588488523).

The spelling of 21334245211 in words is "twenty-one billion, three hundred thirty-four million, two hundred forty-five thousand, two hundred eleven".