21232420411 has 2 divisors, whose sum is σ = 21232420412. Its totient is φ = 21232420410.

The previous prime is 21232420361. The next prime is 21232420421. The reversal of 21232420411 is 11402423212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232420411 - 2¹³ = 21232412219 is a prime.

It is not a weakly prime, because it can be changed into another prime (21232420421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616210205 + 10616210206.

It is an arithmetic number, because the mean of its divisors is an integer number (10616210206).

Almost surely, 2^21232420411 is an apocalyptic number.

21232420411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232420411 is an equidigital number, since it uses as much as digits as its factorization.

21232420411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21232420411 its reverse (11402423212), we get a palindrome (32634843623).

The spelling of 21232420411 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty thousand, four hundred eleven".