13220321020 has 24 divisors (see below), whose sum is σ = 27767250000. Its totient is φ = 5287256832.

The previous prime is 13220321017. The next prime is 13220321027. The reversal of 13220321020 is 2012302231.

It is a junction number, because it is equal to n+sod(n) for n = 13220320985 and 13220321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220321027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77731 + ... + 180229.

It is an arithmetic number, because the mean of its divisors is an integer number (1156968750).

Almost surely, 2^13220321020 is an apocalyptic number.

13220321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220321020 is an abundant number, since it is smaller than the sum of its proper divisors (14546928980).

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

13220321020 is a wasteful number, since it uses less digits than its factorization.

13220321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108957 (or 108955 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 13220321020 its reverse (2012302231), we get a palindrome (15232623251).

The spelling of 13220321020 in words is "thirteen billion, two hundred twenty million, three hundred twenty-one thousand, twenty".