12222311 has 4 divisors (see below), whose sum is σ = 12643800. Its totient is φ = 11800824.

The previous prime is 12222307. The next prime is 12222319. The reversal of 12222311 is 11322221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11322221 = 17 ⋅666013.

It is a cyclic number.

It is not a de Polignac number, because 12222311 - 2² = 12222307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222319) 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, 210701 + ... + 210758.

It is an arithmetic number, because the mean of its divisors is an integer number (3160950).

Almost surely, 2^12222311 is an apocalyptic number.

12222311 is a deficient number, since it is larger than the sum of its proper divisors (421489).

12222311 is an equidigital number, since it uses as much as digits as its factorization.

12222311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421488.

The product of its digits is 48, while the sum is 14.

The square root of 12222311 is about 3496.0421908209. The cubic root of 12222311 is about 230.3479987190.

Adding to 12222311 its reverse (11322221), we get a palindrome (23544532).

The spelling of 12222311 in words is "twelve million, two hundred twenty-two thousand, three hundred eleven".