21112110113 has 16 divisors (see below), whose sum is σ = 22841913600. Its totient is φ = 19453156800.

The previous prime is 21112110109. The next prime is 21112110119. The reversal of 21112110113 is 31101121112.

It is a cyclic number.

It is not a de Polignac number, because 21112110113 - 2² = 21112110109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112110119) 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, 256763 + ... + 328863.

It is an arithmetic number, because the mean of its divisors is an integer number (1427619600).

Almost surely, 2^21112110113 is an apocalyptic number.

21112110113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21112110113 is a deficient number, since it is larger than the sum of its proper divisors (1729803487).

21112110113 is a wasteful number, since it uses less digits than its factorization.

21112110113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72592.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 21112110113 its reverse (31101121112), we get a palindrome (52213231225).

The spelling of 21112110113 in words is "twenty-one billion, one hundred twelve million, one hundred ten thousand, one hundred thirteen".