21100200212 has 48 divisors (see below), whose sum is σ = 45458552832. Its totient is φ = 8345134080.

The previous prime is 21100200151. The next prime is 21100200217. The reversal of 21100200212 is 21200200112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21100200193 and 21100200202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100200217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2581412 + ... + 2589572.

It is an arithmetic number, because the mean of its divisors is an integer number (947053184).

Almost surely, 2^21100200212 is an apocalyptic number.

It is an amenable number.

21100200212 is an abundant number, since it is smaller than the sum of its proper divisors (24358352620).

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

21100200212 is a wasteful number, since it uses less digits than its factorization.

21100200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15288 (or 15286 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21100200212 its reverse (21200200112), we get a palindrome (42300400324).

The spelling of 21100200212 in words is "twenty-one billion, one hundred million, two hundred thousand, two hundred twelve".