1200138112 has 16 divisors (see below), whose sum is σ = 2390900400. Its totient is φ = 600068992.

The previous prime is 1200138073. The next prime is 1200138113. The reversal of 1200138112 is 2118310021.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 1200138112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200138113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4687912 + ... + 4688167.

It is an arithmetic number, because the mean of its divisors is an integer number (149431275).

Almost surely, 2^1200138112 is an apocalyptic number.

It is an amenable number.

1200138112 is a deficient number, since it is larger than the sum of its proper divisors (1190762288).

1200138112 is an frugal number, since it uses more digits than its factorization.

1200138112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376093 (or 9376081 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1200138112 is about 34643.0095690314. The cubic root of 1200138112 is about 1062.6993359243.

Adding to 1200138112 its reverse (2118310021), we get a palindrome (3318448133).

The spelling of 1200138112 in words is "one billion, two hundred million, one hundred thirty-eight thousand, one hundred twelve".