1200200012100 has 144 divisors (see below), whose sum is σ = 3906056315840. Its totient is φ = 320053278240.

The previous prime is 1200200012059. The next prime is 1200200012119. The reversal of 1200200012100 is 12100020021.

It is a Harshad number since it is a multiple of its sum of digits (9).

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, 2525242 + ... + 2962641.

Almost surely, 2^{1200200012100} is an apocalyptic number.

1200200012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200200012100 is an abundant number, since it is smaller than the sum of its proper divisors (2705856303740).

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

1200200012100 is an equidigital number, since it uses as much as digits as its factorization.

1200200012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5487918 (or 5487893 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1200200012100 its reverse (12100020021), we get a palindrome (1212300032121).

The spelling of 1200200012100 in words is "one trillion, two hundred billion, two hundred million, twelve thousand, one hundred".