12221422 has 4 divisors (see below), whose sum is σ = 18332136. Its totient is φ = 6110710.

The previous prime is 12221413. The next prime is 12221431. The reversal of 12221422 is 22412221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12221413) and next prime (12221431).

It is a junction number, because it is equal to n+sod(n) for n = 12221396 and 12221405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055354 + ... + 3055357.

It is an arithmetic number, because the mean of its divisors is an integer number (4583034).

Almost surely, 2^12221422 is an apocalyptic number.

12221422 is a deficient number, since it is larger than the sum of its proper divisors (6110714).

12221422 is an equidigital number, since it uses as much as digits as its factorization.

12221422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110713.

The product of its digits is 128, while the sum is 16.

The square root of 12221422 is about 3495.9150447344. The cubic root of 12221422 is about 230.3424137323.

Adding to 12221422 its reverse (22412221), we get a palindrome (34633643).

The spelling of 12221422 in words is "twelve million, two hundred twenty-one thousand, four hundred twenty-two".