21200211112 has 8 divisors (see below), whose sum is σ = 39750395850. Its totient is φ = 10600105552.

The previous prime is 21200211047. The next prime is 21200211119. The reversal of 21200211112 is 21111200212.

It can be written as a sum of positive squares in only one way, i.e., 20682466596 + 517744516 = 143814^2 + 22754^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21200211092 and 21200211101.

It is not an unprimeable number, because it can be changed into a prime (21200211119) 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, 1325013187 + ... + 1325013202.

Almost surely, 2^21200211112 is an apocalyptic number.

It is an amenable number.

21200211112 is a deficient number, since it is larger than the sum of its proper divisors (18550184738).

21200211112 is a wasteful number, since it uses less digits than its factorization.

21200211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650026395 (or 2650026391 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200211112 its reverse (21111200212), we get a palindrome (42311411324).

The spelling of 21200211112 in words is "twenty-one billion, two hundred million, two hundred eleven thousand, one hundred twelve".