12212213 has 16 divisors (see below), whose sum is σ = 13571712. Its totient is φ = 10920000.

The previous prime is 12212201. The next prime is 12212237. The reversal of 12212213 is 31221221.

It is a happy number.

12212213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12212213 - 2⁴ = 12212197 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93158 + ... + 93288.

It is an arithmetic number, because the mean of its divisors is an integer number (848232).

Almost surely, 2^12212213 is an apocalyptic number.

12212213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12212213 is a deficient number, since it is larger than the sum of its proper divisors (1359499).

12212213 is a wasteful number, since it uses less digits than its factorization.

12212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316.

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

The square root of 12212213 is about 3494.5976878605. The cubic root of 12212213 is about 230.2845438624.

Adding to 12212213 its reverse (31221221), we get a palindrome (43433434).

It can be divided in two parts, 1221221 and 3, that multiplied together give a palindrome (3663663).

The spelling of 12212213 in words is "twelve million, two hundred twelve thousand, two hundred thirteen".