12112101220 has 12 divisors (see below), whose sum is σ = 25435412604. Its totient is φ = 4844840480.

The previous prime is 12112101191. The next prime is 12112101263. The reversal of 12112101220 is 2210121121.

It can be written as a sum of positive squares in 2 ways, for example, as 9160786944 + 2951314276 = 95712^2 + 54326^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12112101220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302802511 + ... + 302802550.

It is an arithmetic number, because the mean of its divisors is an integer number (2119617717).

Almost surely, 2^12112101220 is an apocalyptic number.

12112101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112101220 is an abundant number, since it is smaller than the sum of its proper divisors (13323311384).

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

12112101220 is a wasteful number, since it uses less digits than its factorization.

12112101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605605070 (or 605605068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12112101220 its reverse (2210121121), we get a palindrome (14322222341).

The spelling of 12112101220 in words is "twelve billion, one hundred twelve million, one hundred one thousand, two hundred twenty".