21011101002011 has 2 divisors, whose sum is σ = 21011101002012. Its totient is φ = 21011101002010.

The previous prime is 21011101001999. The next prime is 21011101002043. The reversal of 21011101002011 is 11020010111012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21011101002011 - 2²² = 21011096807707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21011101001983 and 21011101002001.

It is not a weakly prime, because it can be changed into another prime (21011101002611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505550501005 + 10505550501006.

It is an arithmetic number, because the mean of its divisors is an integer number (10505550501006).

Almost surely, 2^{21011101002011} is an apocalyptic number.

21011101002011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011101002011 is an equidigital number, since it uses as much as digits as its factorization.

21011101002011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21011101002011 its reverse (11020010111012), we get a palindrome (32031111113023).

The spelling of 21011101002011 in words is "twenty-one trillion, eleven billion, one hundred one million, two thousand, eleven".