13221213120 has 112 divisors (see below), whose sum is σ = 46641532320. Its totient is φ = 3525654528.

The previous prime is 13221213077. The next prime is 13221213127. The reversal of 13221213120 is 2131212231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13221213093 and 13221213102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221213127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756477 + ... + 773756.

Almost surely, 2^13221213120 is an apocalyptic number.

13221213120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221213120 is an abundant number, since it is smaller than the sum of its proper divisors (33420319200).

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

13221213120 is a wasteful number, since it uses less digits than its factorization.

13221213120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530259 (or 1530243 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13221213120 its reverse (2131212231), we get a palindrome (15352425351).

The spelling of 13221213120 in words is "thirteen billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred twenty".