21440433330011 has 2 divisors, whose sum is σ = 21440433330012. Its totient is φ = 21440433330010.

The previous prime is 21440433329981. The next prime is 21440433330031. The reversal of 21440433330011 is 11003333404412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21440433330011 - 2²² = 21440429135707 is a prime.

It is not a weakly prime, because it can be changed into another prime (21440433330031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720216665005 + 10720216665006.

It is an arithmetic number, because the mean of its divisors is an integer number (10720216665006).

Almost surely, 2^{21440433330011} is an apocalyptic number.

21440433330011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21440433330011 is an equidigital number, since it uses as much as digits as its factorization.

21440433330011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21440433330011 its reverse (11003333404412), we get a palindrome (32443766734423).

The spelling of 21440433330011 in words is "twenty-one trillion, four hundred forty billion, four hundred thirty-three million, three hundred thirty thousand, eleven".