11331321013 has 4 divisors (see below), whose sum is σ = 11823987168. Its totient is φ = 10838654860.

The previous prime is 11331320993. The next prime is 11331321019. The reversal of 11331321013 is 31012313311.

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 11331321013 - 2⁹ = 11331320501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331321019) 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, 246333043 + ... + 246333088.

It is an arithmetic number, because the mean of its divisors is an integer number (2955996792).

Almost surely, 2^11331321013 is an apocalyptic number.

It is an amenable number.

11331321013 is a deficient number, since it is larger than the sum of its proper divisors (492666155).

11331321013 is an equidigital number, since it uses as much as digits as its factorization.

11331321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492666154.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 11331321013 its reverse (31012313311), we get a palindrome (42343634324).

The spelling of 11331321013 in words is "eleven billion, three hundred thirty-one million, three hundred twenty-one thousand, thirteen".