13220221331220 has 96 divisors (see below), whose sum is σ = 38485602140160. Its totient is φ = 3387125566080.

The previous prime is 13220221331209. The next prime is 13220221331221. The reversal of 13220221331220 is 2213312202231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220221331221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25308532 + ... + 25825611.

It is an arithmetic number, because the mean of its divisors is an integer number (400891688960).

Almost surely, 2^{13220221331220} is an apocalyptic number.

13220221331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220221331220 is an abundant number, since it is smaller than the sum of its proper divisors (25265380808940).

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

13220221331220 is a wasteful number, since it uses less digits than its factorization.

13220221331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51134325 (or 51134323 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 13220221331220 its reverse (2213312202231), we get a palindrome (15433533533451).

The spelling of 13220221331220 in words is "thirteen trillion, two hundred twenty billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty".