12001222220321 has 8 divisors (see below), whose sum is σ = 12294639528864. Its totient is φ = 11707838462880.

The previous prime is 12001222220303. The next prime is 12001222220341. The reversal of 12001222220321 is 12302222210021.

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

It is not a de Polignac number, because 12001222220321 - 2⁶ = 12001222220257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001222220293 and 12001222220302.

It is not an unprimeable number, because it can be changed into a prime (12001222220341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7662875 + ... + 9095168.

It is an arithmetic number, because the mean of its divisors is an integer number (1536829941108).

Almost surely, 2^{12001222220321} is an apocalyptic number.

It is an amenable number.

12001222220321 is a deficient number, since it is larger than the sum of its proper divisors (293417308543).

12001222220321 is a wasteful number, since it uses less digits than its factorization.

12001222220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16775551.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12001222220321 its reverse (12302222210021), we get a palindrome (24303444430342).

The spelling of 12001222220321 in words is "twelve trillion, one billion, two hundred twenty-two million, two hundred twenty thousand, three hundred twenty-one".