12113001220 has 72 divisors (see below), whose sum is σ = 26891232984. Its totient is φ = 4582559232.

The previous prime is 12113001209. The next prime is 12113001223. The reversal of 12113001220 is 2210031121.

It can be written as a sum of positive squares in 4 ways, for example, as 5256830016 + 6856171204 = 72504^2 + 82802^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12113001220.

It is not an unprimeable number, because it can be changed into a prime (12113001223) by changing a digit.

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, 6330984 + ... + 6332896.

It is an arithmetic number, because the mean of its divisors is an integer number (373489347).

Almost surely, 2^12113001220 is an apocalyptic number.

12113001220 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 12113001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13445616492).

12113001220 is an abundant number, since it is smaller than the sum of its proper divisors (14778231764).

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

12113001220 is a wasteful number, since it uses less digits than its factorization.

12113001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837 (or 2816 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12113001220 its reverse (2210031121), we get a palindrome (14323032341).

The spelling of 12113001220 in words is "twelve billion, one hundred thirteen million, one thousand, two hundred twenty".