12312227 has 2 divisors, whose sum is σ = 12312228. Its totient is φ = 12312226.

The previous prime is 12312221. The next prime is 12312241. The reversal of 12312227 is 72221321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12312227 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12312199 and 12312208.

It is not a weakly prime, because it can be changed into another prime (12312221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156113 + 6156114.

It is an arithmetic number, because the mean of its divisors is an integer number (6156114).

Almost surely, 2^12312227 is an apocalyptic number.

12312227 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312227 is an equidigital number, since it uses as much as digits as its factorization.

12312227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 20.

The square root of 12312227 is about 3508.8783107996. The cubic root of 12312227 is about 230.9114869870.

Adding to 12312227 its reverse (72221321), we get a palindrome (84533548).

The spelling of 12312227 in words is "twelve million, three hundred twelve thousand, two hundred twenty-seven".