12211530 has 32 divisors (see below), whose sum is σ = 29450304. Its totient is φ = 3240576.

The previous prime is 12211519. The next prime is 12211543. The reversal of 12211530 is 3511221.

12211530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6117 + ... + 7863.

It is an arithmetic number, because the mean of its divisors is an integer number (920322).

Almost surely, 2^12211530 is an apocalyptic number.

12211530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 3494×3495.

12211530 is an abundant number, since it is smaller than the sum of its proper divisors (17238774).

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

12211530 is a wasteful number, since it uses less digits than its factorization.

12211530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12211530 is about 3494.4999642295. The cubic root of 12211530 is about 230.2802506936.

Adding to 12211530 its reverse (3511221), we get a palindrome (15722751).

The spelling of 12211530 in words is "twelve million, two hundred eleven thousand, five hundred thirty".