21222002200212 has 72 divisors (see below), whose sum is σ = 58527250733952. Its totient is φ = 6430253500800.

The previous prime is 21222002200117. The next prime is 21222002200219. The reversal of 21222002200212 is 21200220022212.

21222002200212 is a `hidden beast` number, since 2 + 12 + 220 + 0 + 220 + 0 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222002200219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1158037 + ... + 6617027.

It is an arithmetic number, because the mean of its divisors is an integer number (812878482416).

Almost surely, 2^{21222002200212} is an apocalyptic number.

21222002200212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222002200212 is an abundant number, since it is smaller than the sum of its proper divisors (37305248533740).

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

21222002200212 is a wasteful number, since it uses less digits than its factorization.

21222002200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468829 (or 5468824 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21222002200212 its reverse (21200220022212), we get a palindrome (42422222222424).

The spelling of 21222002200212 in words is "twenty-one trillion, two hundred twenty-two billion, two million, two hundred thousand, two hundred twelve".