100001200 has 60 divisors (see below), whose sum is σ = 258747328. Its totient is φ = 36921600.

The previous prime is 100001183. The next prime is 100001203. The reversal of 100001200 is 2100001.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a self number, because there is not a number n which added to its sum of digits gives 100001200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4416 + ... + 14815.

Almost surely, 2^100001200 is an apocalyptic number.

100001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100001200 is an abundant number, since it is smaller than the sum of its proper divisors (158746128).

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

100001200 is a wasteful number, since it uses less digits than its factorization.

100001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19262 (or 19251 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 100001200 is about 10000.0599998200. The cubic root of 100001200 is about 464.1607399894.

Adding to 100001200 its reverse (2100001), we get a palindrome (102101201).

The spelling of 100001200 in words is "one hundred million, one thousand, two hundred".