21110200212 has 96 divisors (see below), whose sum is σ = 51642468864. Its totient is φ = 6704665600.

The previous prime is 21110200159. The next prime is 21110200217. The reversal of 21110200212 is 21200201112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110200217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17874262 + ... + 17875442.

It is an arithmetic number, because the mean of its divisors is an integer number (537942384).

Almost surely, 2^21110200212 is an apocalyptic number.

It is an amenable number.

21110200212 is an abundant number, since it is smaller than the sum of its proper divisors (30532268652).

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

21110200212 is a wasteful number, since it uses less digits than its factorization.

21110200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049 (or 2047 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21110200212 its reverse (21200201112), we get a palindrome (42310401324).

The spelling of 21110200212 in words is "twenty-one billion, one hundred ten million, two hundred thousand, two hundred twelve".