120112009 has 2 divisors, whose sum is σ = 120112010. Its totient is φ = 120112008.

The previous prime is 120111983. The next prime is 120112019. The reversal of 120112009 is 900211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63441225 + 56670784 = 7965^2 + 7528^2 .

It is a cyclic number.

It is not a de Polignac number, because 120112009 - 2¹⁷ = 119980937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120111983 and 120112001.

It is not a weakly prime, because it can be changed into another prime (120112019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60056004 + 60056005.

It is an arithmetic number, because the mean of its divisors is an integer number (60056005).

Almost surely, 2^120112009 is an apocalyptic number.

It is an amenable number.

120112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

120112009 is an equidigital number, since it uses as much as digits as its factorization.

120112009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 120112009 is about 10959.5624456454. The cubic root of 120112009 is about 493.3958326690.

The spelling of 120112009 in words is "one hundred twenty million, one hundred twelve thousand, nine".