21000110201011 has 4 divisors (see below), whose sum is σ = 21002859274000. Its totient is φ = 20997361128024.

The previous prime is 21000110200997. The next prime is 21000110201039. The reversal of 21000110201011 is 11010201100012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000110201011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000110201051) 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 in 3 ways as a sum of consecutive naturals, for example, 1374525036 + ... + 1374540313.

It is an arithmetic number, because the mean of its divisors is an integer number (5250714818500).

Almost surely, 2^{21000110201011} is an apocalyptic number.

21000110201011 is a deficient number, since it is larger than the sum of its proper divisors (2749072989).

21000110201011 is an equidigital number, since it uses as much as digits as its factorization.

21000110201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749072988.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21000110201011 its reverse (11010201100012), we get a palindrome (32010311301023).

It can be divided in two parts, 21000 and 110201011, that added together give a palindrome (110222011).

The spelling of 21000110201011 in words is "twenty-one trillion, one hundred ten million, two hundred one thousand, eleven".