12222147 has 16 divisors (see below), whose sum is σ = 18682880. Its totient is φ = 6962112.

The previous prime is 12222127. The next prime is 12222151. The reversal of 12222147 is 74122221.

It is not a de Polignac number, because 12222147 - 2¹² = 12218051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12222127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7878 + ... + 9300.

It is an arithmetic number, because the mean of its divisors is an integer number (1167680).

Almost surely, 2^12222147 is an apocalyptic number.

12222147 is a deficient number, since it is larger than the sum of its proper divisors (6460733).

12222147 is a wasteful number, since it uses less digits than its factorization.

12222147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842.

The product of its digits is 448, while the sum is 21.

The square root of 12222147 is about 3496.0187356477. The cubic root of 12222147 is about 230.3469684381.

Adding to 12222147 its reverse (74122221), we get a palindrome (86344368).

It can be divided in two parts, 1222214 and 7, that added together give a palindrome (1222221).

The spelling of 12222147 in words is "twelve million, two hundred twenty-two thousand, one hundred forty-seven".