13220121320 has 64 divisors (see below), whose sum is σ = 34010496000. Its totient is φ = 4530493440.

The previous prime is 13220121307. The next prime is 13220121373. The reversal of 13220121320 is 2312102231.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661880 + ... + 681560.

It is an arithmetic number, because the mean of its divisors is an integer number (531414000).

Almost surely, 2^13220121320 is an apocalyptic number.

13220121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220121320 is an abundant number, since it is smaller than the sum of its proper divisors (20790374680).

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

13220121320 is a wasteful number, since it uses less digits than its factorization.

13220121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22098 (or 22094 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13220121320 its reverse (2312102231), we get a palindrome (15532223551).

The spelling of 13220121320 in words is "thirteen billion, two hundred twenty million, one hundred twenty-one thousand, three hundred twenty".