21202424011 has 2 divisors, whose sum is σ = 21202424012. Its totient is φ = 21202424010.

The previous prime is 21202423993. The next prime is 21202424039. The reversal of 21202424011 is 11042420212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202424011 - 2⁷ = 21202423883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21202424011.

It is not a weakly prime, because it can be changed into another prime (21202424051) 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, 10601212005 + 10601212006.

It is an arithmetic number, because the mean of its divisors is an integer number (10601212006).

Almost surely, 2^21202424011 is an apocalyptic number.

21202424011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202424011 is an equidigital number, since it uses as much as digits as its factorization.

21202424011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202424011 its reverse (11042420212), we get a palindrome (32244844223).

The spelling of 21202424011 in words is "twenty-one billion, two hundred two million, four hundred twenty-four thousand, eleven".