211221002200 has 48 divisors (see below), whose sum is σ = 528864900480. Its totient is φ = 77989292160.

The previous prime is 211221002191. The next prime is 211221002257. The reversal of 211221002200 is 2200122112.

It is a happy number.

211221002200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211221002200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 40616824 + ... + 40622023.

It is an arithmetic number, because the mean of its divisors is an integer number (11018018760).

Almost surely, 2^211221002200 is an apocalyptic number.

211221002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211221002200 is an abundant number, since it is smaller than the sum of its proper divisors (317643898280).

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

211221002200 is a wasteful number, since it uses less digits than its factorization.

211221002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81238876 (or 81238867 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211221002200 its reverse (2200122112), we get a palindrome (213421124312).

The spelling of 211221002200 in words is "two hundred eleven billion, two hundred twenty-one million, two thousand, two hundred".