12133213312 has 128 divisors (see below), whose sum is σ = 27424111680. Its totient is φ = 5298585600.

The previous prime is 12133213283. The next prime is 12133213321. The reversal of 12133213312 is 21331233121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3866208 + ... + 3869344.

Almost surely, 2^12133213312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12133213312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13712055840).

12133213312 is an abundant number, since it is smaller than the sum of its proper divisors (15290898368).

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

12133213312 is a wasteful number, since it uses less digits than its factorization.

12133213312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270 (or 3258 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 12133213312 its reverse (21331233121), we get a palindrome (33464446433).

The spelling of 12133213312 in words is "twelve billion, one hundred thirty-three million, two hundred thirteen thousand, three hundred twelve".