113121312 has 24 divisors (see below), whose sum is σ = 296943696. Its totient is φ = 37707072.

The previous prime is 113121301. The next prime is 113121317. The reversal of 113121312 is 213121311.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 113121291 and 113121300.

It is not an unprimeable number, because it can be changed into a prime (113121317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589078 + ... + 589269.

It is an arithmetic number, because the mean of its divisors is an integer number (12372654).

Almost surely, 2^113121312 is an apocalyptic number.

113121312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

113121312 is an abundant number, since it is smaller than the sum of its proper divisors (183822384).

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

113121312 is a wasteful number, since it uses less digits than its factorization.

113121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178360 (or 1178352 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 113121312 is about 10635.8503186158. The cubic root of 113121312 is about 483.6317577854.

Adding to 113121312 its reverse (213121311), we get a palindrome (326242623).

Subtracting 113121312 from its reverse (213121311), we obtain a palindrome (99999999).

The spelling of 113121312 in words is "one hundred thirteen million, one hundred twenty-one thousand, three hundred twelve".