121613112 has 24 divisors (see below), whose sum is σ = 329369040. Its totient is φ = 40537680.

The previous prime is 121613099. The next prime is 121613113. The reversal of 121613112 is 211316121.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121613113) 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 5 ways as a sum of consecutive naturals, for example, 844464 + ... + 844607.

It is an arithmetic number, because the mean of its divisors is an integer number (13723710).

Almost surely, 2^121613112 is an apocalyptic number.

121613112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121613112 is an abundant number, since it is smaller than the sum of its proper divisors (207755928).

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

121613112 is a wasteful number, since it uses less digits than its factorization.

121613112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689083 (or 1689076 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 121613112 is about 11027.8335134332. The cubic root of 121613112 is about 495.4427382617.

Adding to 121613112 its reverse (211316121), we get a palindrome (332929233).

The spelling of 121613112 in words is "one hundred twenty-one million, six hundred thirteen thousand, one hundred twelve".