13112323321220 has 72 divisors (see below), whose sum is σ = 28118047793472. Its totient is φ = 5136213624960.

The previous prime is 13112323321151. The next prime is 13112323321249. The reversal of 13112323321220 is 2212332321131.

It is a self number, because there is not a number n which added to its sum of digits gives 13112323321220.

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, 16505249 + ... + 17281431.

It is an arithmetic number, because the mean of its divisors is an integer number (390528441576).

Almost surely, 2^{13112323321220} is an apocalyptic number.

13112323321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13112323321220 is an abundant number, since it is smaller than the sum of its proper divisors (15005724472252).

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

13112323321220 is a wasteful number, since it uses less digits than its factorization.

13112323321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776541 (or 776478 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 13112323321220 its reverse (2212332321131), we get a palindrome (15324655642351).

The spelling of 13112323321220 in words is "thirteen trillion, one hundred twelve billion, three hundred twenty-three million, three hundred twenty-one thousand, two hundred twenty".