12001223023221 has 16 divisors (see below), whose sum is σ = 16166777211200. Its totient is φ = 7918243941888.

The previous prime is 12001223023219. The next prime is 12001223023271. The reversal of 12001223023221 is 12232032210021.

It is not a de Polignac number, because 12001223023221 - 2¹ = 12001223023219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001223023201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34955490 + ... + 35297148.

It is an arithmetic number, because the mean of its divisors is an integer number (1010423575700).

Almost surely, 2^{12001223023221} is an apocalyptic number.

It is an amenable number.

12001223023221 is a deficient number, since it is larger than the sum of its proper divisors (4165554187979).

12001223023221 is a wasteful number, since it uses less digits than its factorization.

12001223023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462468.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12001223023221 its reverse (12232032210021), we get a palindrome (24233255233242).

The spelling of 12001223023221 in words is "twelve trillion, one billion, two hundred twenty-three million, twenty-three thousand, two hundred twenty-one".