11311311331121 has 4 divisors (see below), whose sum is σ = 11314647020544. Its totient is φ = 11307975641700.

The previous prime is 11311311331093. The next prime is 11311311331169. The reversal of 11311311331121 is 12113311311311.

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 11311311331121 - 2¹⁰ = 11311311330097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311311331181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1667839625 + ... + 1667846406.

It is an arithmetic number, because the mean of its divisors is an integer number (2828661755136).

Almost surely, 2^{11311311331121} is an apocalyptic number.

It is an amenable number.

11311311331121 is a deficient number, since it is larger than the sum of its proper divisors (3335689423).

11311311331121 is an equidigital number, since it uses as much as digits as its factorization.

11311311331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335689422.

The product of its digits is 162, while the sum is 23.

Adding to 11311311331121 its reverse (12113311311311), we get a palindrome (23424622642432).

The spelling of 11311311331121 in words is "eleven trillion, three hundred eleven billion, three hundred eleven million, three hundred thirty-one thousand, one hundred twenty-one".