12127122 has 48 divisors (see below), whose sum is σ = 30338880. Its totient is φ = 3429216.

The previous prime is 12127109. The next prime is 12127139. The reversal of 12127122 is 22172121.

It is a happy number.

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.

It is a junction number, because it is equal to n+sod(n) for n = 12127095 and 12127104.

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 23 ways as a sum of consecutive naturals, for example, 13293 + ... + 14175.

It is an arithmetic number, because the mean of its divisors is an integer number (632060).

Almost surely, 2^12127122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12127122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15169440).

12127122 is an abundant number, since it is smaller than the sum of its proper divisors (18211758).

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

12127122 is a wasteful number, since it uses less digits than its factorization.

12127122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 1004 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 12127122 is about 3482.4017574082. The cubic root of 12127122 is about 229.7484458290.

Adding to 12127122 its reverse (22172121), we get a palindrome (34299243).

The spelling of 12127122 in words is "twelve million, one hundred twenty-seven thousand, one hundred twenty-two".