13331310421221 has 64 divisors (see below), whose sum is σ = 22570252185600. Its totient is φ = 7714189213632.

The previous prime is 13331310421217. The next prime is 13331310421249. The reversal of 13331310421221 is 12212401313331.

13331310421221 is a `hidden beast` number, since 1 + 3 + 3 + 3 + 1 + 3 + 10 + 421 + 221 = 666.

It is not a de Polignac number, because 13331310421221 - 2² = 13331310421217 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331310421721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13518145 + ... + 14470758.

It is an arithmetic number, because the mean of its divisors is an integer number (352660190400).

Almost surely, 2^{13331310421221} is an apocalyptic number.

It is an amenable number.

13331310421221 is a deficient number, since it is larger than the sum of its proper divisors (9238941764379).

13331310421221 is a wasteful number, since it uses less digits than its factorization.

13331310421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27989007 (or 27989001 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 13331310421221 its reverse (12212401313331), we get a palindrome (25543711734552).

The spelling of 13331310421221 in words is "thirteen trillion, three hundred thirty-one billion, three hundred ten million, four hundred twenty-one thousand, two hundred twenty-one".