13220310312 has 96 divisors (see below), whose sum is σ = 39171487680. Its totient is φ = 3994721280.

The previous prime is 13220310283. The next prime is 13220310329. The reversal of 13220310312 is 21301302231.

13220310312 is a `hidden beast` number, since 1 + 322 + 0 + 31 + 0 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255933 + ... + 303219.

It is an arithmetic number, because the mean of its divisors is an integer number (408036330).

Almost surely, 2^13220310312 is an apocalyptic number.

13220310312 is a gapful number since it is divisible by the number (12) 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 13220310312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19585743840).

13220310312 is an abundant number, since it is smaller than the sum of its proper divisors (25951177368).

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

13220310312 is a wasteful number, since it uses less digits than its factorization.

13220310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47663 (or 47656 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13220310312 its reverse (21301302231), we get a palindrome (34521612543).

The spelling of 13220310312 in words is "thirteen billion, two hundred twenty million, three hundred ten thousand, three hundred twelve".