21113022112211 has 4 divisors (see below), whose sum is σ = 21113033886192. Its totient is φ = 21113010338232.

The previous prime is 21113022112199. The next prime is 21113022112241. The reversal of 21113022112211 is 11221122031112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21113022112211 - 2²⁶ = 21112955003347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113022112241) 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, 2576756 + ... + 6990401.

It is an arithmetic number, because the mean of its divisors is an integer number (5278258471548).

Almost surely, 2^{21113022112211} is an apocalyptic number.

21113022112211 is a deficient number, since it is larger than the sum of its proper divisors (11773981).

21113022112211 is an equidigital number, since it uses as much as digits as its factorization.

21113022112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11773980.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 21113022112211 its reverse (11221122031112), we get a palindrome (32334144143323).

The spelling of 21113022112211 in words is "twenty-one trillion, one hundred thirteen billion, twenty-two million, one hundred twelve thousand, two hundred eleven".