12313001220 has 96 divisors (see below), whose sum is σ = 37155296640. Its totient is φ = 3028700160.

The previous prime is 12313001191. The next prime is 12313001227. The reversal of 12313001220 is 2210031321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12313001220.

It is not an unprimeable number, because it can be changed into a prime (12313001227) 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 31 ways as a sum of consecutive naturals, for example, 1250115 + ... + 1259925.

It is an arithmetic number, because the mean of its divisors is an integer number (387034340).

Almost surely, 2^12313001220 is an apocalyptic number.

12313001220 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 12313001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18577648320).

12313001220 is an abundant number, since it is smaller than the sum of its proper divisors (24842295420).

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

12313001220 is a wasteful number, since it uses less digits than its factorization.

12313001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11445 (or 11443 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12313001220 its reverse (2210031321), we get a palindrome (14523032541).

The spelling of 12313001220 in words is "twelve billion, three hundred thirteen million, one thousand, two hundred twenty".