11111231313 has 96 divisors (see below), whose sum is σ = 20623180032. Its totient is φ = 5608051200.

The previous prime is 11111231249. The next prime is 11111231317. The reversal of 11111231313 is 31313211111.

11111231313 is a `hidden beast` number, since 11 + 111 + 231 + 313 = 666.

It is not a de Polignac number, because 11111231313 - 2⁶ = 11111231249 is a prime.

It is a super-2 number, since 2×11111231313² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11111231317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1845478 + ... + 1851488.

It is an arithmetic number, because the mean of its divisors is an integer number (214824792).

Almost surely, 2^11111231313 is an apocalyptic number.

11111231313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11111231313 is a deficient number, since it is larger than the sum of its proper divisors (9511948719).

11111231313 is a wasteful number, since it uses less digits than its factorization.

11111231313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6135 (or 6132 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11111231313 its reverse (31313211111), we get a palindrome (42424442424).

The spelling of 11111231313 in words is "eleven billion, one hundred eleven million, two hundred thirty-one thousand, three hundred thirteen".