101321123009789 has 2 divisors, whose sum is σ = 101321123009790. Its totient is φ = 101321123009788.

The previous prime is 101321123009779. The next prime is 101321123009809. The reversal of 101321123009789 is 987900321123101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86145462605764 + 15175660404025 = 9281458^2 + 3895595^2 .

It is an emirp because it is prime and its reverse (987900321123101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101321123009789 - 2²⁸ = 101320854574333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101321123009759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50660561504894 + 50660561504895.

It is an arithmetic number, because the mean of its divisors is an integer number (50660561504895).

Almost surely, 2^{101321123009789} is an apocalyptic number.

It is an amenable number.

101321123009789 is a deficient number, since it is larger than the sum of its proper divisors (1).

101321123009789 is an equidigital number, since it uses as much as digits as its factorization.

101321123009789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 101321123009789 in words is "one hundred one trillion, three hundred twenty-one billion, one hundred twenty-three million, nine thousand, seven hundred eighty-nine".