12121232 has 10 divisors (see below), whose sum is σ = 23484918. Its totient is φ = 6060608.

The previous prime is 12121231. The next prime is 12121267. The reversal of 12121232 is 23212121.

It is a happy number.

12121232 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 1597696 = 3244^2 + 1264^2 .

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

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378773 + ... + 378804.

Almost surely, 2^12121232 is an apocalyptic number.

It is an amenable number.

12121232 is a deficient number, since it is larger than the sum of its proper divisors (11363686).

12121232 is an equidigital number, since it uses as much as digits as its factorization.

12121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757585 (or 757579 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 12121232 is about 3481.5559739863. Note that the first 3 decimals coincide. The cubic root of 12121232 is about 229.7112444362.

Adding to 12121232 its reverse (23212121), we get a palindrome (35333353).

The spelling of 12121232 in words is "twelve million, one hundred twenty-one thousand, two hundred thirty-two".