1200100112 has 10 divisors (see below), whose sum is σ = 2325193998. Its totient is φ = 600050048.

The previous prime is 1200100081. The next prime is 1200100129. The reversal of 1200100112 is 2110010021.

It can be written as a sum of positive squares in only one way, i.e., 1097199376 + 102900736 = 33124^2 + 10144^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1200100112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37503113 + ... + 37503144.

Almost surely, 2^1200100112 is an apocalyptic number.

It is an amenable number.

1200100112 is a deficient number, since it is larger than the sum of its proper divisors (1125093886).

1200100112 is an equidigital number, since it uses as much as digits as its factorization.

1200100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75006265 (or 75006259 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1200100112 is about 34642.4611134948. The cubic root of 1200100112 is about 1062.6881197149.

Adding to 1200100112 its reverse (2110010021), we get a palindrome (3310110133).

Subtracting 1200100112 from its reverse (2110010021), we obtain a palindrome (909909909).

The spelling of 1200100112 in words is "one billion, two hundred million, one hundred thousand, one hundred twelve".