12220347 has 4 divisors (see below), whose sum is σ = 16293800. Its totient is φ = 8146896.

The previous prime is 12220333. The next prime is 12220361. The reversal of 12220347 is 74302221.

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 (12220333) and next prime (12220361).

It is not a de Polignac number, because 12220347 - 2¹⁰ = 12219323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220147) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2036722 + ... + 2036727.

It is an arithmetic number, because the mean of its divisors is an integer number (4073450).

Almost surely, 2^12220347 is an apocalyptic number.

12220347 is a deficient number, since it is larger than the sum of its proper divisors (4073453).

12220347 is an equidigital number, since it uses as much as digits as its factorization.

12220347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073452.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 12220347 is about 3495.7612904774. The cubic root of 12220347 is about 230.3356598713.

Adding to 12220347 its reverse (74302221), we get a palindrome (86522568).

The spelling of 12220347 in words is "twelve million, two hundred twenty thousand, three hundred forty-seven".