101109987289 has 2 divisors, whose sum is σ = 101109987290. Its totient is φ = 101109987288.

The previous prime is 101109987257. The next prime is 101109987313. The reversal of 101109987289 is 982789901101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97261025689 + 3848961600 = 311867^2 + 62040^2 .

It is a cyclic number.

It is not a de Polignac number, because 101109987289 - 2⁵ = 101109987257 is a prime.

It is not a weakly prime, because it can be changed into another prime (101109987989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50554993644 + 50554993645.

It is an arithmetic number, because the mean of its divisors is an integer number (50554993645).

Almost surely, 2^101109987289 is an apocalyptic number.

It is an amenable number.

101109987289 is a deficient number, since it is larger than the sum of its proper divisors (1).

101109987289 is an equidigital number, since it uses as much as digits as its factorization.

101109987289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 55.

The spelling of 101109987289 in words is "one hundred one billion, one hundred nine million, nine hundred eighty-seven thousand, two hundred eighty-nine".