12224221002 has 96 divisors (see below), whose sum is σ = 31656723840. Its totient is φ = 3486369600.

The previous prime is 12224220977. The next prime is 12224221003. The reversal of 12224221002 is 20012242221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12224221003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1586403 + ... + 1594089.

It is an arithmetic number, because the mean of its divisors is an integer number (329757540).

Almost surely, 2^12224221002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12224221002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15828361920).

12224221002 is an abundant number, since it is smaller than the sum of its proper divisors (19432502838).

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

12224221002 is a wasteful number, since it uses less digits than its factorization.

12224221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313 (or 8300 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12224221002 its reverse (20012242221), we get a palindrome (32236463223).

It can be divided in two parts, 1222 and 4221002, that added together give a palindrome (4222224).

The spelling of 12224221002 in words is "twelve billion, two hundred twenty-four million, two hundred twenty-one thousand, two".