12112505511 has 4 divisors (see below), whose sum is σ = 16150007352. Its totient is φ = 8075003672.

The previous prime is 12112505507. The next prime is 12112505543. The reversal of 12112505511 is 11550521121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11550521121 = 3 ⋅3850173707.

It is a cyclic number.

It is not a de Polignac number, because 12112505511 - 2² = 12112505507 is a prime.

It is a super-2 number, since 2×12112505511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112505551) 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 3 ways as a sum of consecutive naturals, for example, 2018750916 + ... + 2018750921.

It is an arithmetic number, because the mean of its divisors is an integer number (4037501838).

Almost surely, 2^12112505511 is an apocalyptic number.

12112505511 is a deficient number, since it is larger than the sum of its proper divisors (4037501841).

12112505511 is an equidigital number, since it uses as much as digits as its factorization.

12112505511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037501840.

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 12112505511 in words is "twelve billion, one hundred twelve million, five hundred five thousand, five hundred eleven".