21010010011 has 2 divisors, whose sum is σ = 21010010012. Its totient is φ = 21010010010.

The previous prime is 21010009991. The next prime is 21010010017. The reversal of 21010010011 is 11001001012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010010011 - 2¹⁵ = 21009977243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010009976 and 21010010003.

It is not a weakly prime, because it can be changed into another prime (21010010017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505005005 + 10505005006.

It is an arithmetic number, because the mean of its divisors is an integer number (10505005006).

Almost surely, 2^21010010011 is an apocalyptic number.

21010010011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010010011 is an equidigital number, since it uses as much as digits as its factorization.

21010010011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 21010010011 its reverse (11001001012), we get a palindrome (32011011023).

The spelling of 21010010011 in words is "twenty-one billion, ten million, ten thousand, eleven".