21002101202011 has 2 divisors, whose sum is σ = 21002101202012. Its totient is φ = 21002101202010.

The previous prime is 21002101201973. The next prime is 21002101202077. The reversal of 21002101202011 is 11020210120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002101202011 - 2⁷ = 21002101201883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002101201982 and 21002101202000.

It is not a weakly prime, because it can be changed into another prime (21002101202611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501050601005 + 10501050601006.

It is an arithmetic number, because the mean of its divisors is an integer number (10501050601006).

Almost surely, 2^{21002101202011} is an apocalyptic number.

21002101202011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002101202011 is an equidigital number, since it uses as much as digits as its factorization.

21002101202011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21002101202011 its reverse (11020210120012), we get a palindrome (32022311322023).

The spelling of 21002101202011 in words is "twenty-one trillion, two billion, one hundred one million, two hundred two thousand, eleven".