1200220001200 has 120 divisors (see below), whose sum is σ = 3205020352176. Its totient is φ = 428208768000.

The previous prime is 1200220001137. The next prime is 1200220001293. The reversal of 1200220001200 is 21000220021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2340171 + ... + 2806570.

Almost surely, 2^{1200220001200} is an apocalyptic number.

1200220001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200220001200 is an abundant number, since it is smaller than the sum of its proper divisors (2004800350976).

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

1200220001200 is a wasteful number, since it uses less digits than its factorization.

1200220001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146823 (or 5146812 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1200220001200 its reverse (21000220021), we get a palindrome (1221220221221).

The spelling of 1200220001200 in words is "one trillion, two hundred billion, two hundred twenty million, one thousand, two hundred".