12213004128 has 96 divisors (see below), whose sum is σ = 34554191616. Its totient is φ = 3754695168.

The previous prime is 12213004127. The next prime is 12213004157. The reversal of 12213004128 is 82140031221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 12213004098 and 12213004107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213004127) 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, 1802475 + ... + 1809237.

It is an arithmetic number, because the mean of its divisors is an integer number (359939496).

Almost surely, 2^12213004128 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 12213004128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17277095808).

12213004128 is an abundant number, since it is smaller than the sum of its proper divisors (22341187488).

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

12213004128 is a wasteful number, since it uses less digits than its factorization.

12213004128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8236 (or 8228 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 12213004128 its reverse (82140031221), we get a palindrome (94353035349).

The spelling of 12213004128 in words is "twelve billion, two hundred thirteen million, four thousand, one hundred twenty-eight".