1200212200100 has 18 divisors (see below), whose sum is σ = 2604460474434. Its totient is φ = 480084880000.

The previous prime is 1200212200049. The next prime is 1200212200129. The reversal of 1200212200100 is 10022120021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3363072064 + 1196849128036 = 57992^2 + 1094006^2 .

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 5 ways as a sum of consecutive naturals, for example, 6001060901 + ... + 6001061100.

Almost surely, 2^{1200212200100} is an apocalyptic number.

1200212200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200212200100 is an abundant number, since it is smaller than the sum of its proper divisors (1404248274334).

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

1200212200100 is a wasteful number, since it uses less digits than its factorization.

1200212200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12002122015 (or 12002122008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200212200100 its reverse (10022120021), we get a palindrome (1210234320121).

The spelling of 1200212200100 in words is "one trillion, two hundred billion, two hundred twelve million, two hundred thousand, one hundred".