12000122110021 has 2 divisors, whose sum is σ = 12000122110022. Its totient is φ = 12000122110020.

The previous prime is 12000122110003. The next prime is 12000122110051. The reversal of 12000122110021 is 12001122100021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11771150289921 + 228971820100 = 3430911^2 + 478510^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000122110021 - 2⁴³ = 3204029087813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12000122109983 and 12000122110010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12000122110051) 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 as a sum of consecutive naturals, namely, 6000061055010 + 6000061055011.

It is an arithmetic number, because the mean of its divisors is an integer number (6000061055011).

Almost surely, 2^{12000122110021} is an apocalyptic number.

It is an amenable number.

12000122110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000122110021 is an equidigital number, since it uses as much as digits as its factorization.

12000122110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12000122110021 its reverse (12001122100021), we get a palindrome (24001244210042).

The spelling of 12000122110021 in words is "twelve trillion, one hundred twenty-two million, one hundred ten thousand, twenty-one".