12001103120021 has 8 divisors (see below), whose sum is σ = 12166019964504. Its totient is φ = 11836200280320.

The previous prime is 12001103120011. The next prime is 12001103120029. The reversal of 12001103120021 is 12002130110021.

It can be written as a sum of positive squares in 4 ways, for example, as 4675140625 + 11996427979396 = 68375^2 + 3463586^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001103120021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001103119978 and 12001103120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001103120029) 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, 1769720 + ... + 5209041.

It is an arithmetic number, because the mean of its divisors is an integer number (1520752495563).

Almost surely, 2^{12001103120021} is an apocalyptic number.

It is an amenable number.

12001103120021 is a deficient number, since it is larger than the sum of its proper divisors (164916844483).

12001103120021 is an equidigital number, since it uses as much as digits as its factorization.

12001103120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7002391.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12001103120021 its reverse (12002130110021), we get a palindrome (24003233230042).

The spelling of 12001103120021 in words is "twelve trillion, one billion, one hundred three million, one hundred twenty thousand, twenty-one".