12215133 has 12 divisors (see below), whose sum is σ = 20164768. Its totient is φ = 6980040.

The previous prime is 12215131. The next prime is 12215141. The reversal of 12215133 is 33151221.

12215133 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 12215133 - 2¹ = 12215131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96883 + ... + 97008.

Almost surely, 2^12215133 is an apocalyptic number.

It is an amenable number.

12215133 is a deficient number, since it is larger than the sum of its proper divisors (7949635).

12215133 is a wasteful number, since it uses less digits than its factorization.

12215133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193904 (or 193901 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 12215133 is about 3495.0154506096. The cubic root of 12215133 is about 230.3028964543.

Adding to 12215133 its reverse (33151221), we get a palindrome (45366354).

The spelling of 12215133 in words is "twelve million, two hundred fifteen thousand, one hundred thirty-three".