12133123218 has 32 divisors (see below), whose sum is σ = 27050358720. Its totient is φ = 4031195040.

The previous prime is 12133123217. The next prime is 12133123229. The reversal of 12133123218 is 81232133121.

12133123218 is a `hidden beast` number, since 1 + 2 + 1 + 331 + 2 + 321 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12133123191 and 12133123200.

It is not an unprimeable number, because it can be changed into a prime (12133123217) 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, 349363 + ... + 382518.

It is an arithmetic number, because the mean of its divisors is an integer number (845323710).

Almost surely, 2^12133123218 is an apocalyptic number.

12133123218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12133123218 is an abundant number, since it is smaller than the sum of its proper divisors (14917235502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12133123218 is a wasteful number, since it uses less digits than its factorization.

12133123218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732199 (or 732193 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 12133123218 its reverse (81232133121), we get a palindrome (93365256339).

The spelling of 12133123218 in words is "twelve billion, one hundred thirty-three million, one hundred twenty-three thousand, two hundred eighteen".