12112221320 has 64 divisors (see below), whose sum is σ = 27786665520. Its totient is φ = 4750700544.

The previous prime is 12112221313. The next prime is 12112221349. The reversal of 12112221320 is 2312221121.

It can be written as a sum of positive squares in 8 ways, for example, as 8071584964 + 4040636356 = 89842^2 + 63566^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493172 + ... + 517148.

Almost surely, 2^12112221320 is an apocalyptic number.

12112221320 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 12112221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13893332760).

12112221320 is an abundant number, since it is smaller than the sum of its proper divisors (15674444200).

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

12112221320 is a wasteful number, since it uses less digits than its factorization.

12112221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24234 (or 24230 counting only the distinct ones).

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

Adding to 12112221320 its reverse (2312221121), we get a palindrome (14424442441).

The spelling of 12112221320 in words is "twelve billion, one hundred twelve million, two hundred twenty-one thousand, three hundred twenty".