13031221323121 has 8 divisors (see below), whose sum is σ = 13341029688000. Its totient is φ = 12724377631920.

The previous prime is 13031221323119. The next prime is 13031221323173. The reversal of 13031221323121 is 12132312213031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13031221323121 - 2¹ = 13031221323119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13031221323221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741159525 + ... + 741177106.

It is an arithmetic number, because the mean of its divisors is an integer number (1667628711000).

Almost surely, 2^{13031221323121} is an apocalyptic number.

It is an amenable number.

13031221323121 is a deficient number, since it is larger than the sum of its proper divisors (309808364879).

13031221323121 is a wasteful number, since it uses less digits than its factorization.

13031221323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482336839.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 13031221323121 its reverse (12132312213031), we get a palindrome (25163533536152).

The spelling of 13031221323121 in words is "thirteen trillion, thirty-one billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-one".