12211212221200 has 60 divisors (see below), whose sum is σ = 29517421797328. Its totient is φ = 4854518697600.

The previous prime is 12211212221053. The next prime is 12211212221207. The reversal of 12211212221200 is 212221211221.

It is a super-2 number, since 2×12211212221200² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211212221207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93579066 + ... + 93709465.

Almost surely, 2^{12211212221200} is an apocalyptic number.

12211212221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211212221200 is an abundant number, since it is smaller than the sum of its proper divisors (17306209576128).

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

12211212221200 is a wasteful number, since it uses less digits than its factorization.

12211212221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187288712 (or 187288701 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12211212221200 its reverse (212221211221), we get a palindrome (12423433432421).

The spelling of 12211212221200 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred".