12112321220 has 24 divisors (see below), whose sum is σ = 25866993600. Its totient is φ = 4762810592.

The previous prime is 12112321181. The next prime is 12112321259. The reversal of 12112321220 is 2212321121.

It is an interprime number because it is at equal distance from previous prime (12112321181) and next prime (12112321259).

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, 5131160 + ... + 5133519.

It is an arithmetic number, because the mean of its divisors is an integer number (1077791400).

Almost surely, 2^12112321220 is an apocalyptic number.

12112321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112321220 is an abundant number, since it is smaller than the sum of its proper divisors (13754672380).

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

12112321220 is a wasteful number, since it uses less digits than its factorization.

12112321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264747 (or 10264745 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12112321220 its reverse (2212321121), we get a palindrome (14324642341).

Subtracting from 12112321220 its reverse (2212321121), we obtain a palindrome (9900000099).

The spelling of 12112321220 in words is "twelve billion, one hundred twelve million, three hundred twenty-one thousand, two hundred twenty".