12112012020 has 48 divisors (see below), whose sum is σ = 33918812928. Its totient is φ = 3229376640.

The previous prime is 12112012019. The next prime is 12112012043. The reversal of 12112012020 is 2021021121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12112011987 and 12112012005.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 555525 + ... + 576915.

It is an arithmetic number, because the mean of its divisors is an integer number (706641936).

Almost surely, 2^12112012020 is an apocalyptic number.

12112012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112012020 is an abundant number, since it is smaller than the sum of its proper divisors (21806800908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12112012020 is a wasteful number, since it uses less digits than its factorization.

12112012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30840 (or 30838 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12112012020 its reverse (2021021121), we get a palindrome (14133033141).

The spelling of 12112012020 in words is "twelve billion, one hundred twelve million, twelve thousand, twenty".