12221221330 has 16 divisors (see below), whose sum is σ = 22033863000. Its totient is φ = 4880563072.

The previous prime is 12221221321. The next prime is 12221221333. The reversal of 12221221330 is 3312212221.

It can be written as a sum of positive squares in 4 ways, for example, as 10037434969 + 2183786361 = 100187^2 + 46731^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12221221298 and 12221221307.

It is not an unprimeable number, because it can be changed into a prime (12221221333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984205 + ... + 996544.

Almost surely, 2^12221221330 is an apocalyptic number.

12221221330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221221330 is a deficient number, since it is larger than the sum of its proper divisors (9812641670).

12221221330 is a wasteful number, since it uses less digits than its factorization.

12221221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981373.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12221221330 its reverse (3312212221), we get a palindrome (15533433551).

The spelling of 12221221330 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred thirty".