1200031103 has 4 divisors (see below), whose sum is σ = 1200101328. Its totient is φ = 1199960880.

The previous prime is 1200031081. The next prime is 1200031121. The reversal of 1200031103 is 3011300021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3011300021 = 587 ⋅5129983.

It is a cyclic number.

It is not a de Polignac number, because 1200031103 - 2⁸ = 1200030847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200031123) 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, 8963 + ... + 49803.

It is an arithmetic number, because the mean of its divisors is an integer number (300025332).

Almost surely, 2^1200031103 is an apocalyptic number.

1200031103 is a deficient number, since it is larger than the sum of its proper divisors (70225).

1200031103 is an equidigital number, since it uses as much as digits as its factorization.

1200031103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70224.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1200031103 is about 34641.4650816042. The cubic root of 1200031103 is about 1062.6677501781.

Adding to 1200031103 its reverse (3011300021), we get a palindrome (4211331124).

The spelling of 1200031103 in words is "one billion, two hundred million, thirty-one thousand, one hundred three".