212212111211200 has 336 divisors, whose sum is σ = 554136652984320. Its totient is φ = 79762220052480.

The previous prime is 212212111211147. The next prime is 212212111211209. The reversal of 212212111211200 is 2112111212212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (212212111211209) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 24411834054 + ... + 24411842746.

It is an arithmetic number, because the mean of its divisors is an integer number (1649216229120).

Almost surely, 2^{212212111211200} is an apocalyptic number.

212212111211200 is a gapful number since it is divisible by the number (20) 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 212212111211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277068326492160).

212212111211200 is an abundant number, since it is smaller than the sum of its proper divisors (341924541773120).

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

212212111211200 is a wasteful number, since it uses less digits than its factorization.

212212111211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15184 (or 15169 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212212111211200 its reverse (2112111212212), we get a palindrome (214324222423412).

The spelling of 212212111211200 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred eleven million, two hundred eleven thousand, two hundred".