12121230 has 64 divisors (see below), whose sum is σ = 33136128. Its totient is φ = 2808960.

The previous prime is 12121211. The next prime is 12121231. The reversal of 12121230 is 3212121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121231) 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, 6792 + ... + 8388.

It is an arithmetic number, because the mean of its divisors is an integer number (517752).

Almost surely, 2^12121230 is an apocalyptic number.

12121230 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 12121230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16568064).

12121230 is an abundant number, since it is smaller than the sum of its proper divisors (21014898).

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

12121230 is a wasteful number, since it uses less digits than its factorization.

12121230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641.

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

The square root of 12121230 is about 3481.5556867584. Note that the first 3 decimals coincide. The cubic root of 12121230 is about 229.7112318021.

Adding to 12121230 its reverse (3212121), we get a palindrome (15333351).

It can be divided in two parts, 1212 and 1230, that added together give a palindrome (2442).

The spelling of 12121230 in words is "twelve million, one hundred twenty-one thousand, two hundred thirty".