12001113220021 has 2 divisors, whose sum is σ = 12001113220022. Its totient is φ = 12001113220020.

The previous prime is 12001113220013. The next prime is 12001113220051. The reversal of 12001113220021 is 12002231110021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9754621851121 + 2246491368900 = 3123239^2 + 1498830^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001113220021 - 2³ = 12001113220013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001113219977 and 12001113220004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001113220051) 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 as a sum of consecutive naturals, namely, 6000556610010 + 6000556610011.

It is an arithmetic number, because the mean of its divisors is an integer number (6000556610011).

Almost surely, 2^{12001113220021} is an apocalyptic number.

It is an amenable number.

12001113220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001113220021 is an equidigital number, since it uses as much as digits as its factorization.

12001113220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12001113220021 its reverse (12002231110021), we get a palindrome (24003344330042).

The spelling of 12001113220021 in words is "twelve trillion, one billion, one hundred thirteen million, two hundred twenty thousand, twenty-one".