12001222330021 has 4 divisors (see below), whose sum is σ = 12002920062700. Its totient is φ = 11999524597344.

The previous prime is 12001222329997. The next prime is 12001222330039. The reversal of 12001222330021 is 12003322210021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7852403301796 + 4148819028225 = 2802214^2 + 2036865^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001222330021 - 2⁴³ = 3205129307813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001222330081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848855736 + ... + 848869873.

It is an arithmetic number, because the mean of its divisors is an integer number (3000730015675).

Almost surely, 2^{12001222330021} is an apocalyptic number.

It is an amenable number.

12001222330021 is a deficient number, since it is larger than the sum of its proper divisors (1697732679).

12001222330021 is an equidigital number, since it uses as much as digits as its factorization.

12001222330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697732678.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12001222330021 its reverse (12003322210021), we get a palindrome (24004544540042).

The spelling of 12001222330021 in words is "twelve trillion, one billion, two hundred twenty-two million, three hundred thirty thousand, twenty-one".