120129109 has 2 divisors, whose sum is σ = 120129110. Its totient is φ = 120129108.

The previous prime is 120129103. The next prime is 120129127. The reversal of 120129109 is 901921021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96334225 + 23794884 = 9815^2 + 4878^2 .

It is an emirp because it is prime and its reverse (901921021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120129109 - 2⁹ = 120128597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120129103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60064554 + 60064555.

It is an arithmetic number, because the mean of its divisors is an integer number (60064555).

Almost surely, 2^120129109 is an apocalyptic number.

It is an amenable number.

120129109 is a deficient number, since it is larger than the sum of its proper divisors (1).

120129109 is an equidigital number, since it uses as much as digits as its factorization.

120129109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 120129109 is about 10960.3425585152. The cubic root of 120129109 is about 493.4192460047.

The spelling of 120129109 in words is "one hundred twenty million, one hundred twenty-nine thousand, one hundred nine".