12222111210000 has 400 divisors, whose sum is σ = 40557337497600. Its totient is φ = 3168294912000.

The previous prime is 12222111209953. The next prime is 12222111210013. The reversal of 12222111210000 is 1211122221.

It is a tau number, because it is divible by the number of its divisors (400).

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1419685696 + ... + 1419694304.

It is an arithmetic number, because the mean of its divisors is an integer number (101393343744).

Almost surely, 2^{12222111210000} is an apocalyptic number.

12222111210000 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 12222111210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20278668748800).

12222111210000 is an abundant number, since it is smaller than the sum of its proper divisors (28335226287600).

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

12222111210000 is a wasteful number, since it uses less digits than its factorization.

12222111210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9956 (or 9935 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12222111210000 its reverse (1211122221), we get a palindrome (12223322332221).

The spelling of 12222111210000 in words is "twelve trillion, two hundred twenty-two billion, one hundred eleven million, two hundred ten thousand".