13231320112121 has 4 divisors (see below), whose sum is σ = 13927705381200. Its totient is φ = 12534934843044.

The previous prime is 13231320112093. The next prime is 13231320112123. The reversal of 13231320112121 is 12121102313231.

It is a happy number.

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 13231320112121 - 2²² = 13231315917817 is a prime.

It is a super-2 number, since 2×13231320112121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231320112123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348192634511 + ... + 348192634548.

It is an arithmetic number, because the mean of its divisors is an integer number (3481926345300).

Almost surely, 2^{13231320112121} is an apocalyptic number.

It is an amenable number.

13231320112121 is a deficient number, since it is larger than the sum of its proper divisors (696385269079).

13231320112121 is an equidigital number, since it uses as much as digits as its factorization.

13231320112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696385269078.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13231320112121 its reverse (12121102313231), we get a palindrome (25352422425352).

The spelling of 13231320112121 in words is "thirteen trillion, two hundred thirty-one billion, three hundred twenty million, one hundred twelve thousand, one hundred twenty-one".