20122100109989 has 2 divisors, whose sum is σ = 20122100109990. Its totient is φ = 20122100109988.

The previous prime is 20122100109977. The next prime is 20122100110069. The reversal of 20122100109989 is 98990100122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17449584652900 + 2672515457089 = 4177270^2 + 1634783^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122100109989 - 2⁴⁴ = 2529914065573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122100109589) 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 as a sum of consecutive naturals, namely, 10061050054994 + 10061050054995.

It is an arithmetic number, because the mean of its divisors is an integer number (10061050054995).

Almost surely, 2^{20122100109989} is an apocalyptic number.

It is an amenable number.

20122100109989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122100109989 is an equidigital number, since it uses as much as digits as its factorization.

20122100109989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 20122100109989 in words is "twenty trillion, one hundred twenty-two billion, one hundred million, one hundred nine thousand, nine hundred eighty-nine".