12112112321220 has 96 divisors (see below), whose sum is σ = 34982606534400. Its totient is φ = 3128878831104.

The previous prime is 12112112321203. The next prime is 12112112321299. The reversal of 12112112321220 is 2212321121121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11404080 + ... + 12420839.

It is an arithmetic number, because the mean of its divisors is an integer number (364402151400).

Almost surely, 2^{12112112321220} is an apocalyptic number.

12112112321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112112321220 is an abundant number, since it is smaller than the sum of its proper divisors (22870494213180).

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

12112112321220 is a wasteful number, since it uses less digits than its factorization.

12112112321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23825197 (or 23825195 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12112112321220 its reverse (2212321121121), we get a palindrome (14324433442341).

The spelling of 12112112321220 in words is "twelve trillion, one hundred twelve billion, one hundred twelve million, three hundred twenty-one thousand, two hundred twenty".