12112121120220 has 72 divisors (see below), whose sum is σ = 40080109895280. Its totient is φ = 2936271786240.

The previous prime is 12112121120161. The next prime is 12112121120251. The reversal of 12112121120220 is 2202112121121.

12112121120220 is a `hidden beast` number, since 1 + 211 + 2 + 1 + 211 + 20 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12112121120193 and 12112121120202.

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 23 ways as a sum of consecutive naturals, for example, 3058614465 + ... + 3058618424.

It is an arithmetic number, because the mean of its divisors is an integer number (556668192990).

Almost surely, 2^{12112121120220} is an apocalyptic number.

12112121120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112121120220 is an abundant number, since it is smaller than the sum of its proper divisors (27967988775060).

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

12112121120220 is a wasteful number, since it uses less digits than its factorization.

12112121120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117232915 (or 6117232910 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12112121120220 its reverse (2202112121121), we get a palindrome (14314233241341).

The spelling of 12112121120220 in words is "twelve trillion, one hundred twelve billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty".