12021221223 has 24 divisors (see below), whose sum is σ = 18951728016. Its totient is φ = 7282051200.

The previous prime is 12021221209. The next prime is 12021221231. The reversal of 12021221223 is 32212212021.

12021221223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12021221223 - 2³⁰ = 10947479399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021221196 and 12021221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021221243) 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 23 ways as a sum of consecutive naturals, for example, 183153 + ... + 239973.

It is an arithmetic number, because the mean of its divisors is an integer number (789655334).

Almost surely, 2^12021221223 is an apocalyptic number.

12021221223 is a deficient number, since it is larger than the sum of its proper divisors (6930506793).

12021221223 is a wasteful number, since it uses less digits than its factorization.

12021221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58975 (or 58972 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12021221223 its reverse (32212212021), we get a palindrome (44233433244).

The spelling of 12021221223 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-three".