12112021120 has 64 divisors (see below), whose sum is σ = 29039277600. Its totient is φ = 4830757888.

The previous prime is 12112021111. The next prime is 12112021133. The reversal of 12112021120 is 2112021121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×12112021120² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12112021120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194811 + ... + 249349.

Almost surely, 2^12112021120 is an apocalyptic number.

12112021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14519638800).

12112021120 is an abundant number, since it is smaller than the sum of its proper divisors (16927256480).

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

12112021120 is an equidigital number, since it uses as much as digits as its factorization.

12112021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54905 (or 54893 counting only the distinct ones).

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

Adding to 12112021120 its reverse (2112021121), we get a palindrome (14224042241).

Subtracting from 12112021120 its reverse (2112021121), we obtain a palindrome (9999999999).

The spelling of 12112021120 in words is "twelve billion, one hundred twelve million, twenty-one thousand, one hundred twenty".