12212305 has 8 divisors (see below), whose sum is σ = 16748352. Its totient is φ = 8374128.

The previous prime is 12212303. The next prime is 12212311. The reversal of 12212305 is 50321221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12212305 - 2¹ = 12212303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174427 + ... + 174496.

It is an arithmetic number, because the mean of its divisors is an integer number (2093544).

Almost surely, 2^12212305 is an apocalyptic number.

It is an amenable number.

12212305 is a deficient number, since it is larger than the sum of its proper divisors (4536047).

12212305 is an equidigital number, since it uses as much as digits as its factorization.

12212305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348935.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12212305 is about 3494.6108510105. The cubic root of 12212305 is about 230.2851221394.

Adding to 12212305 its reverse (50321221), we get a palindrome (62533526).

The spelling of 12212305 in words is "twelve million, two hundred twelve thousand, three hundred five".