12001102021221 has 4 divisors (see below), whose sum is σ = 16001469361632. Its totient is φ = 8000734680812.

The previous prime is 12001102021199. The next prime is 12001102021247. The reversal of 12001102021221 is 12212020110021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12001102021221 - 2⁶ = 12001102021157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12001102021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001102021261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000183670201 + ... + 2000183670206.

It is an arithmetic number, because the mean of its divisors is an integer number (4000367340408).

Almost surely, 2^{12001102021221} is an apocalyptic number.

It is an amenable number.

12001102021221 is a deficient number, since it is larger than the sum of its proper divisors (4000367340411).

12001102021221 is an equidigital number, since it uses as much as digits as its factorization.

12001102021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000367340410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12001102021221 its reverse (12212020110021), we get a palindrome (24213122131242).

The spelling of 12001102021221 in words is "twelve trillion, one billion, one hundred two million, twenty-one thousand, two hundred twenty-one".