12213272 has 8 divisors (see below), whose sum is σ = 22899900. Its totient is φ = 6106632.

The previous prime is 12213269. The next prime is 12213283. The reversal of 12213272 is 27231221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 763322 + ... + 763337.

Almost surely, 2^12213272 is an apocalyptic number.

It is an amenable number.

12213272 is a deficient number, since it is larger than the sum of its proper divisors (10686628).

12213272 is a wasteful number, since it uses less digits than its factorization.

12213272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526665 (or 1526661 counting only the distinct ones).

The product of its digits is 336, while the sum is 20.

The square root of 12213272 is about 3494.7492041633. The cubic root of 12213272 is about 230.2912001576.

Adding to 12213272 its reverse (27231221), we get a palindrome (39444493).

The spelling of 12213272 in words is "twelve million, two hundred thirteen thousand, two hundred seventy-two".