120142109 has 2 divisors, whose sum is σ = 120142110. Its totient is φ = 120142108.

The previous prime is 120142067. The next prime is 120142117. The reversal of 120142109 is 901241021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67289209 + 52852900 = 8203^2 + 7270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120142109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120142709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60071054 + 60071055.

It is an arithmetic number, because the mean of its divisors is an integer number (60071055).

Almost surely, 2^120142109 is an apocalyptic number.

It is an amenable number.

120142109 is a deficient number, since it is larger than the sum of its proper divisors (1).

120142109 is an equidigital number, since it uses as much as digits as its factorization.

120142109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 120142109 is about 10960.9355896292. The cubic root of 120142109 is about 493.4370441301.

The spelling of 120142109 in words is "one hundred twenty million, one hundred forty-two thousand, one hundred nine".