21101120210011 has 2 divisors, whose sum is σ = 21101120210012. Its totient is φ = 21101120210010.

The previous prime is 21101120209969. The next prime is 21101120210033. The reversal of 21101120210011 is 11001202110112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101120210011 - 2²¹ = 21101118112859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101120209973 and 21101120210000.

It is not a weakly prime, because it can be changed into another prime (21101120210081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550560105005 + 10550560105006.

It is an arithmetic number, because the mean of its divisors is an integer number (10550560105006).

Almost surely, 2^{21101120210011} is an apocalyptic number.

21101120210011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101120210011 is an equidigital number, since it uses as much as digits as its factorization.

21101120210011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21101120210011 its reverse (11001202110112), we get a palindrome (32102322320123).

The spelling of 21101120210011 in words is "twenty-one trillion, one hundred one billion, one hundred twenty million, two hundred ten thousand, eleven".