12012001001221 has 8 divisors (see below), whose sum is σ = 12936058052960. Its totient is φ = 11087952088752.

The previous prime is 12012001001201. The next prime is 12012001001237. The reversal of 12012001001221 is 12210010021021.

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

It is a cyclic number.

It is not a de Polignac number, because 12012001001221 - 2²⁵ = 12011967446789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012001001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223590 + ... + 5051848.

It is an arithmetic number, because the mean of its divisors is an integer number (1617007256620).

Almost surely, 2^{12012001001221} is an apocalyptic number.

It is an amenable number.

12012001001221 is a deficient number, since it is larger than the sum of its proper divisors (924057051739).

12012001001221 is a wasteful number, since it uses less digits than its factorization.

12012001001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069635.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12012001001221 its reverse (12210010021021), we get a palindrome (24222011022242).

The spelling of 12012001001221 in words is "twelve trillion, twelve billion, one million, one thousand, two hundred twenty-one".