12221311200 has 144 divisors (see below), whose sum is σ = 45463340160. Its totient is φ = 2793438720.

The previous prime is 12221311171. The next prime is 12221311231. The reversal of 12221311200 is 211312221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12221311200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346930 + ... + 380529.

It is an arithmetic number, because the mean of its divisors is an integer number (315717640).

Almost surely, 2^12221311200 is an apocalyptic number.

12221311200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221311200 is an abundant number, since it is smaller than the sum of its proper divisors (33242028960).

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

12221311200 is a wasteful number, since it uses less digits than its factorization.

12221311200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727489 (or 727476 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12221311200 its reverse (211312221), we get a palindrome (12432623421).

The spelling of 12221311200 in words is "twelve billion, two hundred twenty-one million, three hundred eleven thousand, two hundred".