1200211120 has 20 divisors (see below), whose sum is σ = 2790491040. Its totient is φ = 480084416.

The previous prime is 1200211079. The next prime is 1200211183. The reversal of 1200211120 is 211120021.

It is a tau number, because it is divible by the number of its divisors (20).

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

It is a junction number, because it is equal to n+sod(n) for n = 1200211097 and 1200211106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7501240 + ... + 7501399.

It is an arithmetic number, because the mean of its divisors is an integer number (139524552).

Almost surely, 2^1200211120 is an apocalyptic number.

1200211120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200211120 is an abundant number, since it is smaller than the sum of its proper divisors (1590279920).

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

1200211120 is a wasteful number, since it uses less digits than its factorization.

1200211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15002652 (or 15002646 counting only the distinct ones).

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

The square root of 1200211120 is about 34644.0632720817. The cubic root of 1200211120 is about 1062.7208845497.

Adding to 1200211120 its reverse (211120021), we get a palindrome (1411331141).

The spelling of 1200211120 in words is "one billion, two hundred million, two hundred eleven thousand, one hundred twenty".