12122128 has 10 divisors (see below), whose sum is σ = 23486654. Its totient is φ = 6061056.

The previous prime is 12122119. The next prime is 12122153. The reversal of 12122128 is 82122121.

It can be written as a sum of positive squares in only one way, i.e., 7246864 + 4875264 = 2692^2 + 2208^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378801 + ... + 378832.

Almost surely, 2^12122128 is an apocalyptic number.

It is an amenable number.

12122128 is a deficient number, since it is larger than the sum of its proper divisors (11364526).

12122128 is an equidigital number, since it uses as much as digits as its factorization.

12122128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757641 (or 757635 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

The square root of 12122128 is about 3481.6846497062. The cubic root of 12122128 is about 229.7169043726.

Adding to 12122128 its reverse (82122121), we get a palindrome (94244249).

The spelling of 12122128 in words is "twelve million, one hundred twenty-two thousand, one hundred twenty-eight".