113131123312 has 20 divisors (see below), whose sum is σ = 230727949480. Its totient is φ = 53588426688.

The previous prime is 113131123289. The next prime is 113131123321. The reversal of 113131123312 is 213321131311.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 186070623 + ... + 186071230.

It is an arithmetic number, because the mean of its divisors is an integer number (11536397474).

Almost surely, 2^113131123312 is an apocalyptic number.

It is an amenable number.

113131123312 is an abundant number, since it is smaller than the sum of its proper divisors (117596826168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

113131123312 is a wasteful number, since it uses less digits than its factorization.

113131123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372141880 (or 372141874 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

Adding to 113131123312 its reverse (213321131311), we get a palindrome (326452254623).

The spelling of 113131123312 in words is "one hundred thirteen billion, one hundred thirty-one million, one hundred twenty-three thousand, three hundred twelve".