13210121320 has 128 divisors (see below), whose sum is σ = 34436327040. Its totient is φ = 4507402240.

The previous prime is 13210121293. The next prime is 13210121329. The reversal of 13210121320 is 2312101231.

It is a junction number, because it is equal to n+sod(n) for n = 13210121294 and 13210121303.

It is not an unprimeable number, because it can be changed into a prime (13210121329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2637939 + ... + 2642941.

It is an arithmetic number, because the mean of its divisors is an integer number (269033805).

Almost surely, 2^13210121320 is an apocalyptic number.

13210121320 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 13210121320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17218163520).

13210121320 is an abundant number, since it is smaller than the sum of its proper divisors (21226205720).

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

13210121320 is a wasteful number, since it uses less digits than its factorization.

13210121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395 (or 5391 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13210121320 its reverse (2312101231), we get a palindrome (15522222551).

The spelling of 13210121320 in words is "thirteen billion, two hundred ten million, one hundred twenty-one thousand, three hundred twenty".