12121112 has 16 divisors (see below), whose sum is σ = 23211360.
Its totient is φ = 5931424.
The previous prime is 12121103. The next prime is 12121121. The reversal of 12121112 is 21112121.
It is an interprime number because it is at equal distance from previous prime (12121103) and next prime (12121121).
It is a super-2 number, since 2×121211122 = 293842712233088, which contains 22 as substring.
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 junction number, because it is equal to n+sod(n) for n = 12121093 and 12121102.
It is a congruent number.
It is an unprimeable number.
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, 15743 + ... + 16494.
It is an arithmetic number, because the mean of its divisors is an integer number (1450710).
Almost surely, 212121112 is an apocalyptic number.
It is an amenable number.
12121112 is a deficient number, since it is larger than the sum of its proper divisors (11090248).
12121112 is a wasteful number, since it uses less digits than its factorization.
12121112 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 32290 (or 32286 counting only the distinct ones).
The product of its digits is 8, while the sum is 11.
The square root of 12121112 is about 3481.5387402699.
The cubic root of 12121112 is about 229.7104863879.
Adding to 12121112 its reverse (21112121), we get a palindrome (33233233).
It can be divided in two parts, 121 and 21112, that multiplied together give a palindrome (2554552).
The spelling of 12121112 in words is "twelve million, one hundred twenty-one thousand, one hundred twelve".