21242432411 has 2 divisors, whose sum is σ = 21242432412. Its totient is φ = 21242432410.

The previous prime is 21242432359. The next prime is 21242432429. The reversal of 21242432411 is 11423424212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21242432411 - 2⁶ = 21242432347 is a prime.

It is not a weakly prime, because it can be changed into another prime (21242432441) 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, 10621216205 + 10621216206.

It is an arithmetic number, because the mean of its divisors is an integer number (10621216206).

Almost surely, 2^21242432411 is an apocalyptic number.

21242432411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21242432411 is an equidigital number, since it uses as much as digits as its factorization.

21242432411 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21242432411 its reverse (11423424212), we get a palindrome (32665856623).

The spelling of 21242432411 in words is "twenty-one billion, two hundred forty-two million, four hundred thirty-two thousand, four hundred eleven".