21002110202011 has 2 divisors, whose sum is σ = 21002110202012. Its totient is φ = 21002110202010.

The previous prime is 21002110201997. The next prime is 21002110202033. The reversal of 21002110202011 is 11020201120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002110202011 - 2⁷ = 21002110201883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002110201982 and 21002110202000.

It is not a weakly prime, because it can be changed into another prime (21002110202611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501055101005 + 10501055101006.

It is an arithmetic number, because the mean of its divisors is an integer number (10501055101006).

Almost surely, 2^{21002110202011} is an apocalyptic number.

21002110202011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002110202011 is an equidigital number, since it uses as much as digits as its factorization.

21002110202011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21002110202011 its reverse (11020201120012), we get a palindrome (32022311322023).

The spelling of 21002110202011 in words is "twenty-one trillion, two billion, one hundred ten million, two hundred two thousand, eleven".