13023012131221 has 4 divisors (see below), whose sum is σ = 13029399093600. Its totient is φ = 13016625168844.

The previous prime is 13023012131203. The next prime is 13023012131317. The reversal of 13023012131221 is 12213121032031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13023012131221 - 2⁵ = 13023012131189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13023012131192 and 13023012131201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023042131221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3193478131 + ... + 3193482208.

It is an arithmetic number, because the mean of its divisors is an integer number (3257349773400).

Almost surely, 2^{13023012131221} is an apocalyptic number.

It is an amenable number.

13023012131221 is a deficient number, since it is larger than the sum of its proper divisors (6386962379).

13023012131221 is an equidigital number, since it uses as much as digits as its factorization.

13023012131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386962378.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 13023012131221 its reverse (12213121032031), we get a palindrome (25236133163252).

The spelling of 13023012131221 in words is "thirteen trillion, twenty-three billion, twelve million, one hundred thirty-one thousand, two hundred twenty-one".