12211443200 has 120 divisors (see below), whose sum is σ = 33005621880. Its totient is φ = 4440473600.

The previous prime is 12211443191. The next prime is 12211443263. The reversal of 12211443200 is 234411221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97436 + ... + 184164.

It is an arithmetic number, because the mean of its divisors is an integer number (275046849).

Almost surely, 2^12211443200 is an apocalyptic number.

12211443200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211443200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16502810940).

12211443200 is an abundant number, since it is smaller than the sum of its proper divisors (20794178680).

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

12211443200 is an equidigital number, since it uses as much as digits as its factorization.

12211443200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86768 (or 86747 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12211443200 its reverse (234411221), we get a palindrome (12445854421).

The spelling of 12211443200 in words is "twelve billion, two hundred eleven million, four hundred forty-three thousand, two hundred".