13111203 has 16 divisors (see below), whose sum is σ = 20039936. Its totient is φ = 7469280.

The previous prime is 13111201. The next prime is 13111207. The reversal of 13111203 is 30211131.

It is not a de Polignac number, because 13111203 - 2¹ = 13111201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13111201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8100 + ... + 9582.

It is an arithmetic number, because the mean of its divisors is an integer number (1252496).

Almost surely, 2^13111203 is an apocalyptic number.

13111203 is a deficient number, since it is larger than the sum of its proper divisors (6928733).

13111203 is a wasteful number, since it uses less digits than its factorization.

13111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 13111203 is about 3620.9395189647. The cubic root of 13111203 is about 235.8020160384.

Adding to 13111203 its reverse (30211131), we get a palindrome (43322334).

The spelling of 13111203 in words is "thirteen million, one hundred eleven thousand, two hundred three".