13331010031221 has 16 divisors (see below), whose sum is σ = 17916856985600. Its totient is φ = 8816268883968.

The previous prime is 13331010031123. The next prime is 13331010031231. The reversal of 13331010031221 is 12213001013331.

It is a happy number.

It is not a de Polignac number, because 13331010031221 - 2¹⁰ = 13331010030197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331010031231) 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, 919125 + ... + 5244693.

It is an arithmetic number, because the mean of its divisors is an integer number (1119803561600).

Almost surely, 2^{13331010031221} is an apocalyptic number.

It is an amenable number.

13331010031221 is a deficient number, since it is larger than the sum of its proper divisors (4585846954379).

13331010031221 is a wasteful number, since it uses less digits than its factorization.

13331010031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333788.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 13331010031221 its reverse (12213001013331), we get a palindrome (25544011044552).

The spelling of 13331010031221 in words is "thirteen trillion, three hundred thirty-one billion, ten million, thirty-one thousand, two hundred twenty-one".