12221190228 has 96 divisors (see below), whose sum is σ = 31539755520. Its totient is φ = 3659627520.

The previous prime is 12221190227. The next prime is 12221190229. The reversal of 12221190228 is 82209112221.

It is an interprime number because it is at equal distance from previous prime (12221190227) and next prime (12221190229).

It is a junction number, because it is equal to n+sod(n) for n = 12221190195 and 12221190204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221190227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1322488 + ... + 1331696.

It is an arithmetic number, because the mean of its divisors is an integer number (328539120).

Almost surely, 2^12221190228 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 12221190228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15769877760).

12221190228 is an abundant number, since it is smaller than the sum of its proper divisors (19318565292).

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

12221190228 is a wasteful number, since it uses less digits than its factorization.

12221190228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457 (or 9455 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 12221190228 in words is "twelve billion, two hundred twenty-one million, one hundred ninety thousand, two hundred twenty-eight".