1200200100 has 144 divisors (see below), whose sum is σ = 3802423296. Its totient is φ = 289872000.

The previous prime is 1200200083. The next prime is 1200200101. The reversal of 1200200100 is 10020021.

It is a happy number.

1200200100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (1200200101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1210605 + ... + 1211595.

Almost surely, 2^1200200100 is an apocalyptic number.

1200200100 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 1200200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1901211648).

1200200100 is an abundant number, since it is smaller than the sum of its proper divisors (2602223196).

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

1200200100 is a wasteful number, since it uses less digits than its factorization.

1200200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1200200100 is about 34643.9042257076. The cubic root of 1200200100 is about 1062.7176320053.

Adding to 1200200100 its reverse (10020021), we get a palindrome (1210220121).

The spelling of 1200200100 in words is "one billion, two hundred million, two hundred thousand, one hundred".