100120019689 has 2 divisors, whose sum is σ = 100120019690. Its totient is φ = 100120019688.

The previous prime is 100120019669. The next prime is 100120019707. The reversal of 100120019689 is 986910021001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70490250000 + 29629769689 = 265500^2 + 172133^2 .

It is an emirp because it is prime and its reverse (986910021001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100120019689 - 2⁷ = 100120019561 is a prime.

It is not a weakly prime, because it can be changed into another prime (100120019639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060009844 + 50060009845.

It is an arithmetic number, because the mean of its divisors is an integer number (50060009845).

Almost surely, 2^100120019689 is an apocalyptic number.

It is an amenable number.

100120019689 is a deficient number, since it is larger than the sum of its proper divisors (1).

100120019689 is an equidigital number, since it uses as much as digits as its factorization.

100120019689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 100120019689 in words is "one hundred billion, one hundred twenty million, nineteen thousand, six hundred eighty-nine".