12211213 has 8 divisors (see below), whose sum is σ = 13982528. Its totient is φ = 10446624.

The previous prime is 12211193. The next prime is 12211217. The reversal of 12211213 is 31211221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12211213 - 2¹³ = 12203021 is a prime.

It is a super-2 number, since 2×12211213² = 298227445862738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211193 and 12211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3145 + ... + 5857.

It is an arithmetic number, because the mean of its divisors is an integer number (1747816).

Almost surely, 2^12211213 is an apocalyptic number.

It is an amenable number.

12211213 is a deficient number, since it is larger than the sum of its proper divisors (1771315).

12211213 is an equidigital number, since it uses as much as digits as its factorization.

12211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363.

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

The square root of 12211213 is about 3494.4546069451. The cubic root of 12211213 is about 230.2782580558.

Adding to 12211213 its reverse (31211221), we get a palindrome (43422434).

The spelling of 12211213 in words is "twelve million, two hundred eleven thousand, two hundred thirteen".