12213311 has 4 divisors (see below), whose sum is σ = 13323624. Its totient is φ = 11103000.

The previous prime is 12213283. The next prime is 12213317. The reversal of 12213311 is 11331221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11331221 = 11 ⋅1030111.

It is a cyclic number.

It is not a de Polignac number, because 12213311 - 2¹⁸ = 11951167 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 (12213317) 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, 555140 + ... + 555161.

It is an arithmetic number, because the mean of its divisors is an integer number (3330906).

Almost surely, 2^12213311 is an apocalyptic number.

12213311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12213311 is a deficient number, since it is larger than the sum of its proper divisors (1110313).

12213311 is a wasteful number, since it uses less digits than its factorization.

12213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110312.

The product of its digits is 36, while the sum is 14.

The square root of 12213311 is about 3494.7547839584. The cubic root of 12213311 is about 230.2914452829.

Adding to 12213311 its reverse (11331221), we get a palindrome (23544532).

The spelling of 12213311 in words is "twelve million, two hundred thirteen thousand, three hundred eleven".