21110020100011 has 4 divisors (see below), whose sum is σ = 21111985845000. Its totient is φ = 21108054355024.

The previous prime is 21110020099997. The next prime is 21110020100051. The reversal of 21110020100011 is 11000102001112.

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 21110020100011 - 2³⁵ = 21075660361643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110020100051) 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, 982856386 + ... + 982877863.

It is an arithmetic number, because the mean of its divisors is an integer number (5277996461250).

Almost surely, 2^{21110020100011} is an apocalyptic number.

21110020100011 is a deficient number, since it is larger than the sum of its proper divisors (1965744989).

21110020100011 is a wasteful number, since it uses less digits than its factorization.

21110020100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965744988.

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

Adding to 21110020100011 its reverse (11000102001112), we get a palindrome (32110122101123).

The spelling of 21110020100011 in words is "twenty-one trillion, one hundred ten billion, twenty million, one hundred thousand, eleven".