1200100120 has 32 divisors (see below), whose sum is σ = 2745997200. Its totient is φ = 471902848.

The previous prime is 1200100081. The next prime is 1200100129. The reversal of 1200100120 is 210010021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251899 + ... + 256618.

Almost surely, 2^1200100120 is an apocalyptic number.

1200100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200100120 is an abundant number, since it is smaller than the sum of its proper divisors (1545897080).

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

1200100120 is a wasteful number, since it uses less digits than its factorization.

1200100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508587 (or 508583 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1200100120 is about 34642.4612289600. The cubic root of 1200100120 is about 1062.6881220763.

Adding to 1200100120 its reverse (210010021), we get a palindrome (1410110141).

Subtracting from 1200100120 its reverse (210010021), we obtain a palindrome (990090099).

The spelling of 1200100120 in words is "one billion, two hundred million, one hundred thousand, one hundred twenty".