21433411211 has 2 divisors, whose sum is σ = 21433411212. Its totient is φ = 21433411210.

The previous prime is 21433411193. The next prime is 21433411243. The reversal of 21433411211 is 11211433412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21433411211 is a prime.

It is a super-2 number, since 2×21433411211² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21433419211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716705605 + 10716705606.

It is an arithmetic number, because the mean of its divisors is an integer number (10716705606).

Almost surely, 2^21433411211 is an apocalyptic number.

21433411211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433411211 is an equidigital number, since it uses as much as digits as its factorization.

21433411211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

Adding to 21433411211 its reverse (11211433412), we get a palindrome (32644844623).

The spelling of 21433411211 in words is "twenty-one billion, four hundred thirty-three million, four hundred eleven thousand, two hundred eleven".