12213827 has 4 divisors (see below), whose sum is σ = 12856680. Its totient is φ = 11570976.

The previous prime is 12213823. The next prime is 12213841. The reversal of 12213827 is 72831221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72831221 = 769 ⋅94709.

It is a cyclic number.

It is not a de Polignac number, because 12213827 - 2² = 12213823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12213796 and 12213805.

It is not an unprimeable number, because it can be changed into a prime (12213821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321398 + ... + 321435.

It is an arithmetic number, because the mean of its divisors is an integer number (3214170).

Almost surely, 2^12213827 is an apocalyptic number.

12213827 is a deficient number, since it is larger than the sum of its proper divisors (642853).

12213827 is an equidigital number, since it uses as much as digits as its factorization.

12213827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642852.

The product of its digits is 1344, while the sum is 26.

The square root of 12213827 is about 3494.8286081008. The cubic root of 12213827 is about 230.2946884306.

The spelling of 12213827 in words is "twelve million, two hundred thirteen thousand, eight hundred twenty-seven".