11131131313 has 4 divisors (see below), whose sum is σ = 11615093568. Its totient is φ = 10647169060.

The previous prime is 11131131241. The next prime is 11131131409. The reversal of 11131131313 is 31313113111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31313113111 = 7 ⋅4473301873.

It is a cyclic number.

It is not a de Polignac number, because 11131131313 - 2¹⁷ = 11131000241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131138313) 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, 241981093 + ... + 241981138.

It is an arithmetic number, because the mean of its divisors is an integer number (2903773392).

Almost surely, 2^11131131313 is an apocalyptic number.

It is an amenable number.

11131131313 is a deficient number, since it is larger than the sum of its proper divisors (483962255).

11131131313 is an equidigital number, since it uses as much as digits as its factorization.

11131131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483962254.

The product of its digits is 81, while the sum is 19.

Adding to 11131131313 its reverse (31313113111), we get a palindrome (42444244424).

The spelling of 11131131313 in words is "eleven billion, one hundred thirty-one million, one hundred thirty-one thousand, three hundred thirteen".