12213212 has 24 divisors (see below), whose sum is σ = 23451120. Its totient is φ = 5519360.

The previous prime is 12213199. The next prime is 12213221. The reversal of 12213212 is 21231221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7964 + ... + 9372.

It is an arithmetic number, because the mean of its divisors is an integer number (977130).

Almost surely, 2^12213212 is an apocalyptic number.

It is an amenable number.

12213212 is a deficient number, since it is larger than the sum of its proper divisors (11237908).

12213212 is a wasteful number, since it uses less digits than its factorization.

12213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621 (or 1619 counting only the distinct ones).

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

The square root of 12213212 is about 3494.7406198458. The cubic root of 12213212 is about 230.2908230407.

Adding to 12213212 its reverse (21231221), we get a palindrome (33444433).

Subtracting 12213212 from its reverse (21231221), we obtain a square (9018009 = 3003²).

The spelling of 12213212 in words is "twelve million, two hundred thirteen thousand, two hundred twelve".