13031221330331 has 16 divisors (see below), whose sum is σ = 13101812780160. Its totient is φ = 12960756708480.

The previous prime is 13031221330289. The next prime is 13031221330363. The reversal of 13031221330331 is 13303312213031.

It is a cyclic number.

It is not a de Polignac number, because 13031221330331 - 2²⁶ = 13031154221467 is a prime.

It is a super-2 number, since 2×13031221330331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13031221330331.

It is not an unprimeable number, because it can be changed into a prime (13031221330031) 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, 1013859701 + ... + 1013872553.

It is an arithmetic number, because the mean of its divisors is an integer number (818863298760).

Almost surely, 2^{13031221330331} is an apocalyptic number.

13031221330331 is a deficient number, since it is larger than the sum of its proper divisors (70591449829).

13031221330331 is a wasteful number, since it uses less digits than its factorization.

13031221330331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17366.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 13031221330331 its reverse (13303312213031), we get a palindrome (26334533543362).

The spelling of 13031221330331 in words is "thirteen trillion, thirty-one billion, two hundred twenty-one million, three hundred thirty thousand, three hundred thirty-one".