21113200212 has 24 divisors (see below), whose sum is σ = 53053682976. Its totient is φ = 6496369248.

The previous prime is 21113200211. The next prime is 21113200219. The reversal of 21113200212 is 21200231112.

It is a junction number, because it is equal to n+sod(n) for n = 21113200191 and 21113200200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113200211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 67670358 + ... + 67670669.

It is an arithmetic number, because the mean of its divisors is an integer number (2210570124).

Almost surely, 2^21113200212 is an apocalyptic number.

It is an amenable number.

21113200212 is an abundant number, since it is smaller than the sum of its proper divisors (31940482764).

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

21113200212 is a wasteful number, since it uses less digits than its factorization.

21113200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135341047 (or 135341045 counting only the distinct ones).

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

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

The spelling of 21113200212 in words is "twenty-one billion, one hundred thirteen million, two hundred thousand, two hundred twelve".