21002100011 has 2 divisors, whose sum is σ = 21002100012. Its totient is φ = 21002100010.

The previous prime is 21002100001. The next prime is 21002100029. The reversal of 21002100011 is 11000120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002100011 - 2¹⁰ = 21002098987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002100001) 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, 10501050005 + 10501050006.

It is an arithmetic number, because the mean of its divisors is an integer number (10501050006).

Almost surely, 2^21002100011 is an apocalyptic number.

21002100011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002100011 is an equidigital number, since it uses as much as digits as its factorization.

21002100011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21002100011 its reverse (11000120012), we get a palindrome (32002220023).

The spelling of 21002100011 in words is "twenty-one billion, two million, one hundred thousand, eleven".