21033400411 has 2 divisors, whose sum is σ = 21033400412. Its totient is φ = 21033400410.

The previous prime is 21033400393. The next prime is 21033400481. The reversal of 21033400411 is 11400433012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033400411 is a prime.

It is not a weakly prime, because it can be changed into another prime (21033400481) 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, 10516700205 + 10516700206.

It is an arithmetic number, because the mean of its divisors is an integer number (10516700206).

Almost surely, 2^21033400411 is an apocalyptic number.

21033400411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033400411 is an equidigital number, since it uses as much as digits as its factorization.

21033400411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21033400411 its reverse (11400433012), we get a palindrome (32433833423).

The spelling of 21033400411 in words is "twenty-one billion, thirty-three million, four hundred thousand, four hundred eleven".