1200001212200 has 192 divisors, whose sum is σ = 3407697786240. Its totient is φ = 383607521280.

The previous prime is 1200001212139. The next prime is 1200001212247. The reversal of 1200001212200 is 22121000021.

It is a happy 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, 2310992 + ... + 2782208.

It is an arithmetic number, because the mean of its divisors is an integer number (17748425970).

Almost surely, 2^{1200001212200} is an apocalyptic number.

1200001212200 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 1200001212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1703848893120).

1200001212200 is an abundant number, since it is smaller than the sum of its proper divisors (2207696574040).

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

1200001212200 is a wasteful number, since it uses less digits than its factorization.

1200001212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471364 (or 471355 counting only the distinct ones).

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

Adding to 1200001212200 its reverse (22121000021), we get a palindrome (1222122212221).

The spelling of 1200001212200 in words is "one trillion, two hundred billion, one million, two hundred twelve thousand, two hundred".