12270222 has 48 divisors (see below), whose sum is σ = 27675648. Its totient is φ = 3926160.

The previous prime is 12270221. The next prime is 12270229. The reversal of 12270222 is 22207221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12270195 and 12270204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12270221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64147 + ... + 64337.

It is an arithmetic number, because the mean of its divisors is an integer number (576576).

Almost surely, 2^12270222 is an apocalyptic number.

12270222 is an abundant number, since it is smaller than the sum of its proper divisors (15405426).

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

12270222 is a wasteful number, since it uses less digits than its factorization.

12270222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 12270222 is about 3502.8876659122. The cubic root of 12270222 is about 230.6485914572.

Adding to 12270222 its reverse (22207221), we get a palindrome (34477443).

The spelling of 12270222 in words is "twelve million, two hundred seventy thousand, two hundred twenty-two".