12133312221 has 16 divisors (see below), whose sum is σ = 16406780544. Its totient is φ = 7974994944.

The previous prime is 12133312189. The next prime is 12133312231. The reversal of 12133312221 is 12221333121.

It is not a de Polignac number, because 12133312221 - 2⁵ = 12133312189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133312231) 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, 2736 + ... + 155801.

It is an arithmetic number, because the mean of its divisors is an integer number (1025423784).

Almost surely, 2^12133312221 is an apocalyptic number.

It is an amenable number.

12133312221 is a deficient number, since it is larger than the sum of its proper divisors (4273468323).

12133312221 is a wasteful number, since it uses less digits than its factorization.

12133312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158900.

The product of its digits is 432, while the sum is 21.

Adding to 12133312221 its reverse (12221333121), we get a palindrome (24354645342).

The spelling of 12133312221 in words is "twelve billion, one hundred thirty-three million, three hundred twelve thousand, two hundred twenty-one".