12001221003021 has 16 divisors (see below), whose sum is σ = 16059692872128. Its totient is φ = 7971785539200.

The previous prime is 12001221003019. The next prime is 12001221003041. The reversal of 12001221003021 is 12030012210021.

It is not a de Polignac number, because 12001221003021 - 2¹ = 12001221003019 is a prime.

It is a super-2 number, since 2×12001221003021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001221003011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11782566 + ... + 12760536.

It is an arithmetic number, because the mean of its divisors is an integer number (1003730804508).

Almost surely, 2^{12001221003021} is an apocalyptic number.

It is an amenable number.

12001221003021 is a deficient number, since it is larger than the sum of its proper divisors (4058471869107).

12001221003021 is a wasteful number, since it uses less digits than its factorization.

12001221003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992812.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12001221003021 its reverse (12030012210021), we get a palindrome (24031233213042).

The spelling of 12001221003021 in words is "twelve trillion, one billion, two hundred twenty-one million, three thousand, twenty-one".