12121221332 has 24 divisors (see below), whose sum is σ = 23180666880. Its totient is φ = 5500085760.

The previous prime is 12121221319. The next prime is 12121221337. The reversal of 12121221332 is 23312212121.

12121221332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121221337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213332 + ... + 264107.

It is an arithmetic number, because the mean of its divisors is an integer number (965861120).

Almost surely, 2^12121221332 is an apocalyptic number.

It is an amenable number.

12121221332 is a deficient number, since it is larger than the sum of its proper divisors (11059445548).

12121221332 is a wasteful number, since it uses less digits than its factorization.

12121221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478031 (or 478029 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 12121221332 its reverse (23312212121), we get a palindrome (35433433453).

The spelling of 12121221332 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, three hundred thirty-two".