12212011221200 has 90 divisors (see below), whose sum is σ = 34129456109046. Its totient is φ = 4186975269120.

The previous prime is 12212011221181. The next prime is 12212011221229. The reversal of 12212011221200 is 212211021221.

It can be written as a sum of positive squares in 3 ways, for example, as 80499308176 + 12131511913024 = 283724^2 + 3483032^2 .

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 311511299 + ... + 311550498.

Almost surely, 2^{12212011221200} is an apocalyptic number.

12212011221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212011221200 is an abundant number, since it is smaller than the sum of its proper divisors (21917444887846).

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

12212011221200 is a wasteful number, since it uses less digits than its factorization.

12212011221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623061829 (or 623061811 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12212011221200 its reverse (212211021221), we get a palindrome (12424222242421).

The spelling of 12212011221200 in words is "twelve trillion, two hundred twelve billion, eleven million, two hundred twenty-one thousand, two hundred".