13321212220 has 48 divisors (see below), whose sum is σ = 29354088960. Its totient is φ = 5068306496.

The previous prime is 13321212199. The next prime is 13321212251. The reversal of 13321212220 is 2221212331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449 + ... + 163231.

It is an arithmetic number, because the mean of its divisors is an integer number (611543520).

Almost surely, 2^13321212220 is an apocalyptic number.

13321212220 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 13321212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14677044480).

13321212220 is an abundant number, since it is smaller than the sum of its proper divisors (16032876740).

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

13321212220 is a wasteful number, since it uses less digits than its factorization.

13321212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161994 (or 161992 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13321212220 its reverse (2221212331), we get a palindrome (15542424551).

The spelling of 13321212220 in words is "thirteen billion, three hundred twenty-one million, two hundred twelve thousand, two hundred twenty".