21034433411 has 2 divisors, whose sum is σ = 21034433412. Its totient is φ = 21034433410.

The previous prime is 21034433263. The next prime is 21034433419. The reversal of 21034433411 is 11433443012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21034433411 - 2²² = 21030239107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21034433419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517216705 + 10517216706.

It is an arithmetic number, because the mean of its divisors is an integer number (10517216706).

Almost surely, 2^21034433411 is an apocalyptic number.

21034433411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034433411 is an equidigital number, since it uses as much as digits as its factorization.

21034433411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21034433411 its reverse (11433443012), we get a palindrome (32467876423).

The spelling of 21034433411 in words is "twenty-one billion, thirty-four million, four hundred thirty-three thousand, four hundred eleven".