101120989 has 2 divisors, whose sum is σ = 101120990. Its totient is φ = 101120988.

The previous prime is 101120951. The next prime is 101121011. The reversal of 101120989 is 989021101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91355364 + 9765625 = 9558^2 + 3125^2 .

It is an emirp because it is prime and its reverse (989021101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101120989 - 2¹³ = 101112797 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101120989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101120909) 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, 50560494 + 50560495.

It is an arithmetic number, because the mean of its divisors is an integer number (50560495).

Almost surely, 2^101120989 is an apocalyptic number.

It is an amenable number.

101120989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101120989 is an equidigital number, since it uses as much as digits as its factorization.

101120989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 101120989 is about 10055.8932472456. The cubic root of 101120989 is about 465.8868326571.

The spelling of 101120989 in words is "one hundred one million, one hundred twenty thousand, nine hundred eighty-nine".