21110111101112 has 32 divisors (see below), whose sum is σ = 43182284943600. Its totient is φ = 9594946771200.

The previous prime is 21110111101111. The next prime is 21110111101129.

21110111101112 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110111101111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5455439 + ... + 8484222.

Almost surely, 2^{21110111101112} is an apocalyptic number.

21110111101112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21110111101112 is an abundant number, since it is smaller than the sum of its proper divisors (22072173842488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110111101112 is a wasteful number, since it uses less digits than its factorization.

21110111101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13956887 (or 13956883 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 14.

It can be divided in two parts, 2111011 and 1101112, that multiplied together give a palindrome (2324459544232).

The spelling of 21110111101112 in words is "twenty-one trillion, one hundred ten billion, one hundred eleven million, one hundred one thousand, one hundred twelve".