13221223122444 has 48 divisors (see below), whose sum is σ = 30892848644448. Its totient is φ = 4400887315968.

The previous prime is 13221223122403. The next prime is 13221223122463. The reversal of 13221223122444 is 44422132212231.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40174614 + ... + 40502370.

It is an arithmetic number, because the mean of its divisors is an integer number (643601013426).

Almost surely, 2^{13221223122444} is an apocalyptic number.

It is an amenable number.

13221223122444 is an abundant number, since it is smaller than the sum of its proper divisors (17671625522004).

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

13221223122444 is a wasteful number, since it uses less digits than its factorization.

13221223122444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332474 (or 332472 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

Adding to 13221223122444 its reverse (44422132212231), we get a palindrome (57643355334675).

The spelling of 13221223122444 in words is "thirteen trillion, two hundred twenty-one billion, two hundred twenty-three million, one hundred twenty-two thousand, four hundred forty-four".