102120111120689 has 2 divisors, whose sum is σ = 102120111120690. Its totient is φ = 102120111120688.

The previous prime is 102120111120683. The next prime is 102120111120733. The reversal of 102120111120689 is 986021111021201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101304386040064 + 815725080625 = 10065008^2 + 903175^2 .

It is a cyclic number.

It is not a de Polignac number, because 102120111120689 - 2⁴ = 102120111120673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (102120111120683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060055560344 + 51060055560345.

It is an arithmetic number, because the mean of its divisors is an integer number (51060055560345).

Almost surely, 2^{102120111120689} is an apocalyptic number.

It is an amenable number.

102120111120689 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120111120689 is an equidigital number, since it uses as much as digits as its factorization.

102120111120689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 35.

The spelling of 102120111120689 in words is "one hundred two trillion, one hundred twenty billion, one hundred eleven million, one hundred twenty thousand, six hundred eighty-nine".