12221230530 has 16 divisors (see below), whose sum is σ = 29330953344. Its totient is φ = 3258994800.

The previous prime is 12221230493. The next prime is 12221230531. The reversal of 12221230530 is 3503212221.

It is a junction number, because it is equal to n+sod(n) for n = 12221230497 and 12221230506.

It is not an unprimeable number, because it can be changed into a prime (12221230531) 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, 203687146 + ... + 203687205.

It is an arithmetic number, because the mean of its divisors is an integer number (1833184584).

Almost surely, 2^12221230530 is an apocalyptic number.

12221230530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221230530 is an abundant number, since it is smaller than the sum of its proper divisors (17109722814).

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

12221230530 is a wasteful number, since it uses less digits than its factorization.

12221230530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407374361.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 12221230530 its reverse (3503212221), we get a palindrome (15724442751).

The spelling of 12221230530 in words is "twelve billion, two hundred twenty-one million, two hundred thirty thousand, five hundred thirty".