11111131320131 has 4 divisors (see below), whose sum is σ = 11127991914600. Its totient is φ = 11094270725664.

The previous prime is 11111131320083. The next prime is 11111131320137. The reversal of 11111131320131 is 13102313111111.

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

It is a cyclic number.

It is not a de Polignac number, because 11111131320131 - 2¹⁰ = 11111131319107 is a prime.

It is a super-2 number, since 2×11111131320131² (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 (11111131320137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8430296246 + ... + 8430297563.

It is an arithmetic number, because the mean of its divisors is an integer number (2781997978650).

Almost surely, 2^{11111131320131} is an apocalyptic number.

11111131320131 is a deficient number, since it is larger than the sum of its proper divisors (16860594469).

11111131320131 is an equidigital number, since it uses as much as digits as its factorization.

11111131320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16860594468.

The product of its (nonzero) digits is 54, while the sum is 20.

Adding to 11111131320131 its reverse (13102313111111), we get a palindrome (24213444431242).

The spelling of 11111131320131 in words is "eleven trillion, one hundred eleven billion, one hundred thirty-one million, three hundred twenty thousand, one hundred thirty-one".