21002200212 has 48 divisors (see below), whose sum is σ = 56101409280. Its totient is φ = 5990392032.

The previous prime is 21002200207. The next prime is 21002200213. The reversal of 21002200212 is 21200220012.

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 (21002200213) 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, 163662 + ... + 262277.

It is an arithmetic number, because the mean of its divisors is an integer number (1168779360).

Almost surely, 2^21002200212 is an apocalyptic number.

It is an amenable number.

21002200212 is an abundant number, since it is smaller than the sum of its proper divisors (35099209068).

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

21002200212 is a wasteful number, since it uses less digits than its factorization.

21002200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426540 (or 426538 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21002200212 its reverse (21200220012), we get a palindrome (42202420224).

The spelling of 21002200212 in words is "twenty-one billion, two million, two hundred thousand, two hundred twelve".