12212311 has 2 divisors, whose sum is σ = 12212312. Its totient is φ = 12212310.

The previous prime is 12212303. The next prime is 12212327. The reversal of 12212311 is 11321221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12212311 - 2³ = 12212303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212291 and 12212300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212111) 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 as a sum of consecutive naturals, namely, 6106155 + 6106156.

It is an arithmetic number, because the mean of its divisors is an integer number (6106156).

Almost surely, 2^12212311 is an apocalyptic number.

12212311 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212311 is an equidigital number, since it uses as much as digits as its factorization.

12212311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24, while the sum is 13.

The square root of 12212311 is about 3494.6117094750. The cubic root of 12212311 is about 230.2851598530.

Adding to 12212311 its reverse (11321221), we get a palindrome (23533532).

The spelling of 12212311 in words is "twelve million, two hundred twelve thousand, three hundred eleven".