12221130 has 64 divisors (see below), whose sum is σ = 32099328. Its totient is φ = 2964480.

The previous prime is 12221117. The next prime is 12221171. The reversal of 12221130 is 3112221.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15424 + ... + 16196.

It is an arithmetic number, because the mean of its divisors is an integer number (501552).

Almost surely, 2^12221130 is an apocalyptic number.

12221130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16049664).

12221130 is an abundant number, since it is smaller than the sum of its proper divisors (19878198).

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

12221130 is a wasteful number, since it uses less digits than its factorization.

12221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12221130 is about 3495.8732814563. The cubic root of 12221130 is about 230.3405792343.

Adding to 12221130 its reverse (3112221), we get a palindrome (15333351).

The spelling of 12221130 in words is "twelve million, two hundred twenty-one thousand, one hundred thirty".