13221210033020 has 72 divisors (see below), whose sum is σ = 30532395625200. Its totient is φ = 4805452664320.

The previous prime is 13221210033019. The next prime is 13221210033049. The reversal of 13221210033020 is 2033001212231.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13221210032983 and 13221210033001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3869111 + ... + 6435249.

It is an arithmetic number, because the mean of its divisors is an integer number (424061050350).

Almost surely, 2^{13221210033020} is an apocalyptic number.

13221210033020 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 13221210033020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15266197812600).

13221210033020 is an abundant number, since it is smaller than the sum of its proper divisors (17311185592180).

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

13221210033020 is a wasteful number, since it uses less digits than its factorization.

13221210033020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568299 (or 2568286 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13221210033020 its reverse (2033001212231), we get a palindrome (15254211245251).

The spelling of 13221210033020 in words is "thirteen trillion, two hundred twenty-one billion, two hundred ten million, thirty-three thousand, twenty".