12111513 has 4 divisors (see below), whose sum is σ = 16148688. Its totient is φ = 8074340.

The previous prime is 12111511. The next prime is 12111521. The reversal of 12111513 is 31511121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31511121 = 3 ⋅10503707.

It is a cyclic number.

It is not a de Polignac number, because 12111513 - 2¹ = 12111511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111492 and 12111501.

It is not an unprimeable number, because it can be changed into a prime (12111511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018583 + ... + 2018588.

It is an arithmetic number, because the mean of its divisors is an integer number (4037172).

Almost surely, 2^12111513 is an apocalyptic number.

It is an amenable number.

12111513 is a deficient number, since it is larger than the sum of its proper divisors (4037175).

12111513 is an equidigital number, since it uses as much as digits as its factorization.

12111513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037174.

The product of its digits is 30, while the sum is 15.

The square root of 12111513 is about 3480.1599101191. The cubic root of 12111513 is about 229.6498326218.

Adding to 12111513 its reverse (31511121), we get a palindrome (43622634).

The spelling of 12111513 in words is "twelve million, one hundred eleven thousand, five hundred thirteen".