11331131231113 has 4 divisors (see below), whose sum is σ = 11331489287700. Its totient is φ = 11330773174528.

The previous prime is 11331131231081. The next prime is 11331131231213. The reversal of 11331131231113 is 31113213113311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10122883995904 + 1208247235209 = 3181648^2 + 1099203^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331131231113 - 2⁵ = 11331131231081 is a prime.

It is a super-2 number, since 2×11331131231113² (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 (11331131231213) 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, 178980820 + ... + 179044117.

It is an arithmetic number, because the mean of its divisors is an integer number (2832872321925).

Almost surely, 2^{11331131231113} is an apocalyptic number.

It is an amenable number.

11331131231113 is a deficient number, since it is larger than the sum of its proper divisors (358056587).

11331131231113 is an equidigital number, since it uses as much as digits as its factorization.

11331131231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358056586.

The product of its digits is 486, while the sum is 25.

Adding to 11331131231113 its reverse (31113213113311), we get a palindrome (42444344344424).

The spelling of 11331131231113 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred thirteen".