21200231112 has 16 divisors (see below), whose sum is σ = 53000577840. Its totient is φ = 7066743696.

The previous prime is 21200231077. The next prime is 21200231131. The reversal of 21200231112 is 21113200212.

It is a junction number, because it is equal to n+sod(n) for n = 21200231091 and 21200231100.

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 in 3 ways as a sum of consecutive naturals, for example, 441671458 + ... + 441671505.

It is an arithmetic number, because the mean of its divisors is an integer number (3312536115).

Almost surely, 2^21200231112 is an apocalyptic number.

It is an amenable number.

21200231112 is an abundant number, since it is smaller than the sum of its proper divisors (31800346728).

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

21200231112 is a wasteful number, since it uses less digits than its factorization.

21200231112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883342972 (or 883342968 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21200231112 its reverse (21113200212), we get a palindrome (42313431324).

The spelling of 21200231112 in words is "twenty-one billion, two hundred million, two hundred thirty-one thousand, one hundred twelve".