12112505533 has 4 divisors (see below), whose sum is σ = 12115941340. Its totient is φ = 12109069728.

The previous prime is 12112505507. The next prime is 12112505543. The reversal of 12112505533 is 33550521121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1191837529 + 10920668004 = 34523^2 + 104502^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112505533 - 2⁹ = 12112505021 is a prime.

It is a super-2 number, since 2×12112505533² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112505543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712610 + ... + 1719667.

It is an arithmetic number, because the mean of its divisors is an integer number (3028985335).

Almost surely, 2^12112505533 is an apocalyptic number.

It is an amenable number.

12112505533 is a deficient number, since it is larger than the sum of its proper divisors (3435807).

12112505533 is an equidigital number, since it uses as much as digits as its factorization.

12112505533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435806.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 12112505533 in words is "twelve billion, one hundred twelve million, five hundred five thousand, five hundred thirty-three".