12112011021220 has 48 divisors (see below), whose sum is σ = 27835047914688. Its totient is φ = 4390473714560.

The previous prime is 12112011021217. The next prime is 12112011021223. The reversal of 12112011021220 is 2212011021121.

It is an interprime number because it is at equal distance from previous prime (12112011021217) and next prime (12112011021223).

It is a junction number, because it is equal to n+sod(n) for n = 12112011021194 and 12112011021203.

It is not an unprimeable number, because it can be changed into a prime (12112011021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86767162 + ... + 86906641.

It is an arithmetic number, because the mean of its divisors is an integer number (579896831556).

Almost surely, 2^{12112011021220} is an apocalyptic number.

12112011021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112011021220 is an abundant number, since it is smaller than the sum of its proper divisors (15723036893468).

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

12112011021220 is a wasteful number, since it uses less digits than its factorization.

12112011021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173674140 (or 173674138 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12112011021220 its reverse (2212011021121), we get a palindrome (14324022042341).

Subtracting from 12112011021220 its reverse (2212011021121), we obtain a palindrome (9900000000099).

The spelling of 12112011021220 in words is "twelve trillion, one hundred twelve billion, eleven million, twenty-one thousand, two hundred twenty".