12111132515 has 8 divisors (see below), whose sum is σ = 14534358768. Its totient is φ = 9688239520.

The previous prime is 12111132491. The next prime is 12111132529. The reversal of 12111132515 is 51523111121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12111132515 - 2⁸ = 12111132259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5189 + ... + 155721.

It is an arithmetic number, because the mean of its divisors is an integer number (1816794846).

Almost surely, 2^12111132515 is an apocalyptic number.

12111132515 is a deficient number, since it is larger than the sum of its proper divisors (2423226253).

12111132515 is a wasteful number, since it uses less digits than its factorization.

12111132515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166629.

The product of its digits is 300, while the sum is 23.

Adding to 12111132515 its reverse (51523111121), we get a palindrome (63634243636).

The spelling of 12111132515 in words is "twelve billion, one hundred eleven million, one hundred thirty-two thousand, five hundred fifteen".