12001223020221 has 24 divisors (see below), whose sum is σ = 18473668012800. Its totient is φ = 7490124999456.

The previous prime is 12001223020187. The next prime is 12001223020277. The reversal of 12001223020221 is 12202032210021.

12001223020221 is a `hidden beast` number, since 1 + 20 + 0 + 122 + 302 + 0 + 221 = 666.

It is not a de Polignac number, because 12001223020221 - 2¹¹ = 12001223018173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001223020194 and 12001223020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001223025221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 616766046 + ... + 616785503.

It is an arithmetic number, because the mean of its divisors is an integer number (769736167200).

Almost surely, 2^{12001223020221} is an apocalyptic number.

It is an amenable number.

12001223020221 is a deficient number, since it is larger than the sum of its proper divisors (6472444992579).

12001223020221 is a wasteful number, since it uses less digits than its factorization.

12001223020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233551625 (or 1233551622 counting only the distinct ones).

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

Adding to 12001223020221 its reverse (12202032210021), we get a palindrome (24203255230242).

The spelling of 12001223020221 in words is "twelve trillion, one billion, two hundred twenty-three million, twenty thousand, two hundred twenty-one".