12221533 has 16 divisors (see below), whose sum is σ = 13427712. Its totient is φ = 11088000.

The previous prime is 12221527. The next prime is 12221543. The reversal of 12221533 is 33512221.

It is a cyclic number.

It is not a de Polignac number, because 12221533 - 2⁹ = 12221021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12221533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221543) 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, 43353 + ... + 43633.

It is an arithmetic number, because the mean of its divisors is an integer number (839232).

Almost surely, 2^12221533 is an apocalyptic number.

It is an amenable number.

12221533 is a deficient number, since it is larger than the sum of its proper divisors (1206179).

12221533 is a wasteful number, since it uses less digits than its factorization.

12221533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its digits is 360, while the sum is 19.

The square root of 12221533 is about 3495.9309203701. The cubic root of 12221533 is about 230.3431110851.

Adding to 12221533 its reverse (33512221), we get a palindrome (45733754).

The spelling of 12221533 in words is "twelve million, two hundred twenty-one thousand, five hundred thirty-three".