12212221300000 has 144 divisors (see below), whose sum is σ = 30219520201920. Its totient is φ = 4857591520000.

The previous prime is 12212221299953. The next prime is 12212221300021. The reversal of 12212221300000 is 312221221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

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 23 ways as a sum of consecutive naturals, for example, 17558877 + ... + 18241123.

It is an arithmetic number, because the mean of its divisors is an integer number (209857779180).

Almost surely, 2^{12212221300000} is an apocalyptic number.

12212221300000 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 12212221300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15109760100960).

12212221300000 is an abundant number, since it is smaller than the sum of its proper divisors (18007298901920).

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

12212221300000 is an frugal number, since it uses more digits than its factorization.

12212221300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682461 (or 682433 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12212221300000 its reverse (312221221), we get a palindrome (12212533521221).

The spelling of 12212221300000 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-one million, three hundred thousand".