13031134430221 has 16 divisors (see below), whose sum is σ = 13364775895680. Its totient is φ = 12701697648640.

The previous prime is 13031134430207. The next prime is 13031134430233. The reversal of 13031134430221 is 12203443113031.

It is a cyclic number.

It is not a de Polignac number, because 13031134430221 - 2¹¹ = 13031134428173 is a prime.

It is a super-3 number, since 3×13031134430221³ (a number of 40 digits) contains 333 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 13031134430221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031134433221) 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, 53672526 + ... + 53914768.

It is an arithmetic number, because the mean of its divisors is an integer number (835298493480).

Almost surely, 2^{13031134430221} is an apocalyptic number.

It is an amenable number.

13031134430221 is a deficient number, since it is larger than the sum of its proper divisors (333641465459).

13031134430221 is an equidigital number, since it uses as much as digits as its factorization.

13031134430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250916.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 13031134430221 its reverse (12203443113031), we get a palindrome (25234577543252).

The spelling of 13031134430221 in words is "thirteen trillion, thirty-one billion, one hundred thirty-four million, four hundred thirty thousand, two hundred twenty-one".