1200011103 has 12 divisors (see below), whose sum is σ = 1733782128. Its totient is φ = 799807680.

The previous prime is 1200011077. The next prime is 1200011123. The reversal of 1200011103 is 3011100021.

It is not a de Polignac number, because 1200011103 - 2³⁰ = 126269279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200011123) 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 11 ways as a sum of consecutive naturals, for example, 27598 + ... + 56228.

It is an arithmetic number, because the mean of its divisors is an integer number (144481844).

Almost surely, 2^1200011103 is an apocalyptic number.

1200011103 is a deficient number, since it is larger than the sum of its proper divisors (533771025).

1200011103 is a wasteful number, since it uses less digits than its factorization.

1200011103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33294 (or 33291 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1200011103 is about 34641.1764090078. The cubic root of 1200011103 is about 1062.6618465886.

Adding to 1200011103 its reverse (3011100021), we get a palindrome (4211111124).

It can be divided in two parts, 120001 and 1103, that added together give a square (121104 = 348²).

The spelling of 1200011103 in words is "one billion, two hundred million, eleven thousand, one hundred three".