1200111103 has 4 divisors (see below), whose sum is σ = 1200565440. Its totient is φ = 1199656768.

The previous prime is 1200111061. The next prime is 1200111119. The reversal of 1200111103 is 3011110021.

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 1200111103 - 2²⁹ = 663240191 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 1200111103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223183 + ... + 228496.

It is an arithmetic number, because the mean of its divisors is an integer number (300141360).

Almost surely, 2^1200111103 is an apocalyptic number.

1200111103 is a deficient number, since it is larger than the sum of its proper divisors (454337).

1200111103 is an equidigital number, since it uses as much as digits as its factorization.

1200111103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454336.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1200111103 is about 34642.6197479348. The cubic root of 1200111103 is about 1062.6913638802.

Adding to 1200111103 its reverse (3011110021), we get a palindrome (4211221124).

It can be divided in two parts, 12001 and 11103, that added together give a square (23104 = 152²).

The spelling of 1200111103 in words is "one billion, two hundred million, one hundred eleven thousand, one hundred three".