12212947 has 4 divisors (see below), whose sum is σ = 12252280. Its totient is φ = 12173616.

The previous prime is 12212939. The next prime is 12212951. The reversal of 12212947 is 74921221.

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

It is a cyclic number.

It is not a de Polignac number, because 12212947 - 2³ = 12212939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19197 + ... + 19822.

It is an arithmetic number, because the mean of its divisors is an integer number (3063070).

Almost surely, 2^12212947 is an apocalyptic number.

12212947 is a deficient number, since it is larger than the sum of its proper divisors (39333).

12212947 is an equidigital number, since it uses as much as digits as its factorization.

12212947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39332.

The product of its digits is 2016, while the sum is 28.

The square root of 12212947 is about 3494.7027055245. The cubic root of 12212947 is about 230.2891574262.

The spelling of 12212947 in words is "twelve million, two hundred twelve thousand, nine hundred forty-seven".