21200001112 has 8 divisors (see below), whose sum is σ = 39750002100. Its totient is φ = 10600000552.

The previous prime is 21200001103. The next prime is 21200001133. The reversal of 21200001112 is 21110000212.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1325000062 + ... + 1325000077.

Almost surely, 2^21200001112 is an apocalyptic number.

It is an amenable number.

21200001112 is a deficient number, since it is larger than the sum of its proper divisors (18550000988).

21200001112 is a wasteful number, since it uses less digits than its factorization.

21200001112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650000145 (or 2650000141 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21200001112 its reverse (21110000212), we get a palindrome (42310001324).

The spelling of 21200001112 in words is "twenty-one billion, two hundred million, one thousand, one hundred twelve".