21112201110111 has 16 divisors (see below), whose sum is σ = 29087765971584. Its totient is φ = 13610385980064.

The previous prime is 21112201110061. The next prime is 21112201110197. The reversal of 21112201110111 is 11101110221112.

It is not a de Polignac number, because 21112201110111 - 2⁶ = 21112201110047 is a prime.

It is a super-3 number, since 3×21112201110111³ (a number of 41 digits) contains 333 as substring.

21112201110111 is a modest number, since divided by 1110111 gives 211122 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112201110211) 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, 583417521 + ... + 583453706.

It is an arithmetic number, because the mean of its divisors is an integer number (1817985373224).

Almost surely, 2^{21112201110111} is an apocalyptic number.

21112201110111 is a deficient number, since it is larger than the sum of its proper divisors (7975564861473).

21112201110111 is a wasteful number, since it uses less digits than its factorization.

21112201110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166871430.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21112201110111 its reverse (11101110221112), we get a palindrome (32213311331223).

The spelling of 21112201110111 in words is "twenty-one trillion, one hundred twelve billion, two hundred one million, one hundred ten thousand, one hundred eleven".