12128122 has 4 divisors (see below), whose sum is σ = 18192186. Its totient is φ = 6064060.

The previous prime is 12128117. The next prime is 12128131. The reversal of 12128122 is 22182121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22182121 = 13 ⋅1706317.

It can be written as a sum of positive squares in only one way, i.e., 11826721 + 301401 = 3439^2 + 549^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12128122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3032029 + ... + 3032032.

Almost surely, 2^12128122 is an apocalyptic number.

12128122 is a deficient number, since it is larger than the sum of its proper divisors (6064064).

12128122 is an equidigital number, since it uses as much as digits as its factorization.

12128122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064063.

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

The square root of 12128122 is about 3482.5453335169. The cubic root of 12128122 is about 229.7547606587.

The spelling of 12128122 in words is "twelve million, one hundred twenty-eight thousand, one hundred twenty-two".