12001112110021 has 2 divisors, whose sum is σ = 12001112110022. Its totient is φ = 12001112110020.

The previous prime is 12001112109947. The next prime is 12001112110033. The reversal of 12001112110021 is 12001121110021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6532553244996 + 5468558865025 = 2555886^2 + 2338495^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001112110021 - 2⁹ = 12001112109509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001112109983 and 12001112110010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001112710021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000556055010 + 6000556055011.

It is an arithmetic number, because the mean of its divisors is an integer number (6000556055011).

Almost surely, 2^{12001112110021} is an apocalyptic number.

It is an amenable number.

12001112110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001112110021 is an equidigital number, since it uses as much as digits as its factorization.

12001112110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12001112110021 its reverse (12001121110021), we get a palindrome (24002233220042).

Subtracting 12001112110021 from its reverse (12001121110021), we obtain a square (9000000 = 3000²).

The spelling of 12001112110021 in words is "twelve trillion, one billion, one hundred twelve million, one hundred ten thousand, twenty-one".