21101022110011 has 4 divisors (see below), whose sum is σ = 21781700242624. Its totient is φ = 20420343977400.

The previous prime is 21101022110009. The next prime is 21101022110039. The reversal of 21101022110011 is 11001122010112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21101022110011 - 2¹ = 21101022110009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101022109973 and 21101022110000.

It is not an unprimeable number, because it can be changed into a prime (21101022110411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340339066260 + ... + 340339066321.

It is an arithmetic number, because the mean of its divisors is an integer number (5445425060656).

Almost surely, 2^{21101022110011} is an apocalyptic number.

21101022110011 is a deficient number, since it is larger than the sum of its proper divisors (680678132613).

21101022110011 is an equidigital number, since it uses as much as digits as its factorization.

21101022110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680678132612.

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

Adding to 21101022110011 its reverse (11001122010112), we get a palindrome (32102144120123).

The spelling of 21101022110011 in words is "twenty-one trillion, one hundred one billion, twenty-two million, one hundred ten thousand, eleven".