21200113112 has 8 divisors (see below), whose sum is σ = 39750212100. Its totient is φ = 10600056552.

The previous prime is 21200113111. The next prime is 21200113117. The reversal of 21200113112 is 21131100212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200113111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325007062 + ... + 1325007077.

Almost surely, 2^21200113112 is an apocalyptic number.

It is an amenable number.

21200113112 is a deficient number, since it is larger than the sum of its proper divisors (18550098988).

21200113112 is a wasteful number, since it uses less digits than its factorization.

21200113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650014145 (or 2650014141 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21200113112 its reverse (21131100212), we get a palindrome (42331213324).

The spelling of 21200113112 in words is "twenty-one billion, two hundred million, one hundred thirteen thousand, one hundred twelve".