12112011111220 has 12 divisors (see below), whose sum is σ = 25435223333604. Its totient is φ = 4844804444480.

The previous prime is 12112011111077. The next prime is 12112011111283. The reversal of 12112011111220 is 2211111021121.

It can be written as a sum of positive squares in 2 ways, for example, as 5217258993424 + 6894752117796 = 2284132^2 + 2625786^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12112011111194 and 12112011111203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302800277761 + ... + 302800277800.

It is an arithmetic number, because the mean of its divisors is an integer number (2119601944467).

Almost surely, 2^{12112011111220} is an apocalyptic number.

12112011111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112011111220 is an abundant number, since it is smaller than the sum of its proper divisors (13323212222384).

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

12112011111220 is a wasteful number, since it uses less digits than its factorization.

12112011111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605600555570 (or 605600555568 counting only the distinct ones).

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

Adding to 12112011111220 its reverse (2211111021121), we get a palindrome (14323122132341).

Subtracting from 12112011111220 its reverse (2211111021121), we obtain a palindrome (9900900090099).

The spelling of 12112011111220 in words is "twelve trillion, one hundred twelve billion, eleven million, one hundred eleven thousand, two hundred twenty".