1200022001100 has 216 divisors, whose sum is σ = 4177435179120. Its totient is φ = 295389918720.

The previous prime is 1200022001089. The next prime is 1200022001131. The reversal of 1200022001100 is 11002200021.

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 71 ways as a sum of consecutive naturals, for example, 858649 + ... + 1771248.

Almost surely, 2^{1200022001100} is an apocalyptic number.

1200022001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200022001100 is an abundant number, since it is smaller than the sum of its proper divisors (2977413178020).

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

1200022001100 is a wasteful number, since it uses less digits than its factorization.

1200022001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629946 (or 2629920 counting only the distinct ones).

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

Adding to 1200022001100 its reverse (11002200021), we get a palindrome (1211024201121).

The spelling of 1200022001100 in words is "one trillion, two hundred billion, twenty-two million, one thousand, one hundred".