12213232122 has 128 divisors (see below), whose sum is σ = 30849122304. Its totient is φ = 3137315328.

The previous prime is 12213232121. The next prime is 12213232153. The reversal of 12213232122 is 22123231221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12213232121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14250718 + ... + 14251574.

It is an arithmetic number, because the mean of its divisors is an integer number (241008768).

Almost surely, 2^12213232122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12213232122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15424561152).

12213232122 is an abundant number, since it is smaller than the sum of its proper divisors (18635890182).

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

12213232122 is a wasteful number, since it uses less digits than its factorization.

12213232122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 576, while the sum is 21.

Adding to 12213232122 its reverse (22123231221), we get a palindrome (34336463343).

Subtracting 12213232122 from its reverse (22123231221), we obtain a palindrome (9909999099).

The spelling of 12213232122 in words is "twelve billion, two hundred thirteen million, two hundred thirty-two thousand, one hundred twenty-two".