12000022 has 4 divisors (see below), whose sum is σ = 18000036.
Its totient is φ = 6000010.
The previous prime is 12000017. The next prime is 12000029. The reversal of 12000022 is 22000021.
Adding to 12000022 its reverse (22000021), we get a palindrome (34000043).
Subtracting 12000022 from its reverse (22000021), we obtain a palindrome (9999999).
It is a happy number.
It is a semiprime because it is the product of two primes.
12000022 is a modest number, since divided by 22 gives 12 as remainder.
It is a junction number, because it is equal to n+sod(n) for n = 11999969 and 12000014.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12000029) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3000004 + ... + 3000007.
It is an arithmetic number, because the mean of its divisors is an integer number (4500009).
Almost surely, 212000022 is an apocalyptic number.
12000022 is a deficient number, since it is larger than the sum of its proper divisors (6000014).
12000022 is an equidigital number, since it uses as much as digits as its factorization.
12000022 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6000013.
The product of its (nonzero) digits is 8, while the sum is 7.
The square root of 12000022 is about 3464.1047905628.
The cubic root of 12000022 is about 228.9429884201.
The spelling of 12000022 in words is "twelve million, twenty-two", and thus it is an aban number and an uban number.