12001010221221 has 16 divisors (see below), whose sum is σ = 18287302061184. Its totient is φ = 6857701979904.

The previous prime is 12001010221171. The next prime is 12001010221261. The reversal of 12001010221221 is 12212201010021.

12001010221221 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 12001010221221 - 2¹⁴ = 12001010204837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12001010221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001010221261) 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, 15182641 + ... + 15953513.

It is an arithmetic number, because the mean of its divisors is an integer number (1142956378824).

Almost surely, 2^{12001010221221} is an apocalyptic number.

It is an amenable number.

12001010221221 is a deficient number, since it is larger than the sum of its proper divisors (6286291839963).

12001010221221 is an equidigital number, since it uses as much as digits as its factorization.

12001010221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512220.

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

Adding to 12001010221221 its reverse (12212201010021), we get a palindrome (24213211231242).

The spelling of 12001010221221 in words is "twelve trillion, one billion, ten million, two hundred twenty-one thousand, two hundred twenty-one".