13331204222121 has 16 divisors (see below), whose sum is σ = 19784160856000. Its totient is φ = 8872066577664.

The previous prime is 13331204222113. The next prime is 13331204222173. The reversal of 13331204222121 is 12122240213331.

13331204222121 is a `hidden beast` number, since 1 + 3 + 3 + 3 + 1 + 20 + 422 + 212 + 1 = 666.

It is not a de Polignac number, because 13331204222121 - 2³ = 13331204222113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13331204220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427842571 + ... + 427873728.

It is an arithmetic number, because the mean of its divisors is an integer number (1236510053500).

Almost surely, 2^{13331204222121} is an apocalyptic number.

It is an amenable number.

13331204222121 is a deficient number, since it is larger than the sum of its proper divisors (6452956633879).

13331204222121 is an equidigital number, since it uses as much as digits as its factorization.

13331204222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855716885 (or 855716879 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 13331204222121 its reverse (12122240213331), we get a palindrome (25453444435452).

The spelling of 13331204222121 in words is "thirteen trillion, three hundred thirty-one billion, two hundred four million, two hundred twenty-two thousand, one hundred twenty-one".