12021212233 has 8 divisors (see below), whose sum is σ = 12234468680. Its totient is φ = 11808478080.

The previous prime is 12021212221. The next prime is 12021212237. The reversal of 12021212233 is 33221212021.

It can be written as a sum of positive squares in 4 ways, for example, as 460016704 + 11561195529 = 21448^2 + 107523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12021212233 - 2⁹ = 12021211721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021212233.

It is not an unprimeable number, because it can be changed into a prime (12021212237) 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 7 ways as a sum of consecutive naturals, for example, 83988 + ... + 176341.

It is an arithmetic number, because the mean of its divisors is an integer number (1529308585).

Almost surely, 2^12021212233 is an apocalyptic number.

It is an amenable number.

12021212233 is a deficient number, since it is larger than the sum of its proper divisors (213256447).

12021212233 is an equidigital number, since it uses as much as digits as its factorization.

12021212233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261147.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12021212233 its reverse (33221212021), we get a palindrome (45242424254).

The spelling of 12021212233 in words is "twelve billion, twenty-one million, two hundred twelve thousand, two hundred thirty-three".