1200200211100 has 72 divisors (see below), whose sum is σ = 2844986409216. Its totient is φ = 435855000000.

The previous prime is 1200200211047. The next prime is 1200200211113. The reversal of 1200200211100 is 11120020021.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99675 + ... + 1552525.

It is an arithmetic number, because the mean of its divisors is an integer number (39513700128).

Almost surely, 2^{1200200211100} is an apocalyptic number.

1200200211100 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 1200200211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422493204608).

1200200211100 is an abundant number, since it is smaller than the sum of its proper divisors (1644786198116).

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

1200200211100 is a wasteful number, since it uses less digits than its factorization.

1200200211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453627 (or 1453620 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200200211100 its reverse (11120020021), we get a palindrome (1211320231121).

The spelling of 1200200211100 in words is "one trillion, two hundred billion, two hundred million, two hundred eleven thousand, one hundred".