21110112110011 has 16 divisors (see below), whose sum is σ = 21874466335680. Its totient is φ = 20357775060480.

The previous prime is 21110112109949. The next prime is 21110112110069. The reversal of 21110112110011 is 11001121101112.

It is a cyclic number.

It is not a de Polignac number, because 21110112110011 - 2²³ = 21110103721403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110112109973 and 21110112110000.

It is not an unprimeable number, because it can be changed into a prime (21110112117011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11450506 + ... + 13165648.

It is an arithmetic number, because the mean of its divisors is an integer number (1367154145980).

Almost surely, 2^{21110112110011} is an apocalyptic number.

21110112110011 is a deficient number, since it is larger than the sum of its proper divisors (764354225669).

21110112110011 is a wasteful number, since it uses less digits than its factorization.

21110112110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718646.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 21110112110011 its reverse (11001121101112), we get a palindrome (32111233211123).

The spelling of 21110112110011 in words is "twenty-one trillion, one hundred ten billion, one hundred twelve million, one hundred ten thousand, eleven".