1200012103 has 4 divisors (see below), whose sum is σ = 1201190760. Its totient is φ = 1198833448.

The previous prime is 1200012101. The next prime is 1200012173. The reversal of 1200012103 is 3012100021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200012103 - 2¹ = 1200012101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587800 + ... + 589837.

It is an arithmetic number, because the mean of its divisors is an integer number (300297690).

Almost surely, 2^1200012103 is an apocalyptic number.

1200012103 is a deficient number, since it is larger than the sum of its proper divisors (1178657).

1200012103 is a wasteful number, since it uses less digits than its factorization.

1200012103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178656.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1200012103 is about 34641.1908426948. The cubic root of 1200012103 is about 1062.6621417697.

Adding to 1200012103 its reverse (3012100021), we get a palindrome (4212112124).

The spelling of 1200012103 in words is "one billion, two hundred million, twelve thousand, one hundred three".