12212211222200 has 192 divisors, whose sum is σ = 32145781824000. Its totient is φ = 4273879232000.

The previous prime is 12212211222193. The next prime is 12212211222217. The reversal of 12212211222200 is 222211221221.

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 47 ways as a sum of consecutive naturals, for example, 19534061 + ... + 20149539.

It is an arithmetic number, because the mean of its divisors is an integer number (167425947000).

Almost surely, 2^{12212211222200} is an apocalyptic number.

12212211222200 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 12212211222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16072890912000).

12212211222200 is an abundant number, since it is smaller than the sum of its proper divisors (19933570601800).

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

12212211222200 is a wasteful number, since it uses less digits than its factorization.

12212211222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615846 (or 615837 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12212211222200 its reverse (222211221221), we get a palindrome (12434422443421).

The spelling of 12212211222200 in words is "twelve trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, two hundred".