13220120232312 has 128 divisors (see below), whose sum is σ = 38572281216000. Its totient is φ = 3774270864000.

The previous prime is 13220120232283. The next prime is 13220120232323. The reversal of 13220120232312 is 21323202102231.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10092637 + ... + 11327027.

It is an arithmetic number, because the mean of its divisors is an integer number (301345947000).

Almost surely, 2^{13220120232312} is an apocalyptic number.

13220120232312 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 13220120232312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19286140608000).

13220120232312 is an abundant number, since it is smaller than the sum of its proper divisors (25352160983688).

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

13220120232312 is a wasteful number, since it uses less digits than its factorization.

13220120232312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235722 (or 1235704 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 13220120232312 its reverse (21323202102231), we get a palindrome (34543322334543).

The spelling of 13220120232312 in words is "thirteen trillion, two hundred twenty billion, one hundred twenty million, two hundred thirty-two thousand, three hundred twelve".