13423441221320 has 96 divisors (see below), whose sum is σ = 32714797389120. Its totient is φ = 4954824126720.

The previous prime is 13423441221299. The next prime is 13423441221397. The reversal of 13423441221320 is 2312214432431.

It is a happy number.

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, 21808427 + ... + 22415493.

It is an arithmetic number, because the mean of its divisors is an integer number (340779139470).

Almost surely, 2^{13423441221320} is an apocalyptic number.

13423441221320 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 13423441221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16357398694560).

13423441221320 is an abundant number, since it is smaller than the sum of its proper divisors (19291356167800).

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

13423441221320 is a wasteful number, since it uses less digits than its factorization.

13423441221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610375 (or 610358 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 13423441221320 its reverse (2312214432431), we get a palindrome (15735655653751).

The spelling of 13423441221320 in words is "thirteen trillion, four hundred twenty-three billion, four hundred forty-one million, two hundred twenty-one thousand, three hundred twenty".