13111331023121 has 4 divisors (see below), whose sum is σ = 13129365867072. Its totient is φ = 13093296179172.

The previous prime is 13111331023081. The next prime is 13111331023123. The reversal of 13111331023121 is 12132013311131.

13111331023121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13111331023121 - 2¹⁴ = 13111331006737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111331023123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9017420885 + ... + 9017422338.

It is an arithmetic number, because the mean of its divisors is an integer number (3282341466768).

Almost surely, 2^{13111331023121} is an apocalyptic number.

It is an amenable number.

13111331023121 is a deficient number, since it is larger than the sum of its proper divisors (18034843951).

13111331023121 is an equidigital number, since it uses as much as digits as its factorization.

13111331023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18034843950.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 13111331023121 its reverse (12132013311131), we get a palindrome (25243344334252).

The spelling of 13111331023121 in words is "thirteen trillion, one hundred eleven billion, three hundred thirty-one million, twenty-three thousand, one hundred twenty-one".