12133138 has 24 divisors (see below), whose sum is σ = 19831068. Its totient is φ = 5548032.

The previous prime is 12133129. The next prime is 12133139. The reversal of 12133138 is 83133121.

It can be written as a sum of positive squares in 2 ways, for example, as 12131289 + 1849 = 3483^2 + 43^2 .

It is not an unprimeable number, because it can be changed into a prime (12133139) 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, 62770 + ... + 62962.

Almost surely, 2^12133138 is an apocalyptic number.

12133138 is a deficient number, since it is larger than the sum of its proper divisors (7697930).

12133138 is a wasteful number, since it uses less digits than its factorization.

12133138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 255 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 12133138 is about 3483.2654219855. The cubic root of 12133138 is about 229.7864306083.

Adding to 12133138 its reverse (83133121), we get a palindrome (95266259).

The spelling of 12133138 in words is "twelve million, one hundred thirty-three thousand, one hundred thirty-eight".