12022211 has 4 divisors (see below), whose sum is σ = 12436800.
Its totient is φ = 11607624.
The previous prime is 12022181. The next prime is 12022223. The reversal of 12022211 is 11222021.
Adding to 12022211 its reverse (11222021), we get a palindrome (23244232).
It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 12022211 - 210 = 12021187 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 12022192 and 12022201.
It is not an unprimeable number, because it can be changed into a prime (12022291) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207251 + ... + 207308.
It is an arithmetic number, because the mean of its divisors is an integer number (3109200).
Almost surely, 212022211 is an apocalyptic number.
12022211 is a deficient number, since it is larger than the sum of its proper divisors (414589).
12022211 is an equidigital number, since it uses as much as digits as its factorization.
12022211 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 414588.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 12022211 is about 3467.3060147613.
The cubic root of 12022211 is about 229.0840128300.
The spelling of 12022211 in words is "twelve million, twenty-two thousand, two hundred eleven".