120102009 has 16 divisors (see below), whose sum is σ = 163555392. Its totient is φ = 78375168.

The previous prime is 120102001. The next prime is 120102013. The reversal of 120102009 is 900201021.

It is a happy number.

It is not a de Polignac number, because 120102009 - 2³ = 120102001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120102001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28002 + ... + 32004.

It is an arithmetic number, because the mean of its divisors is an integer number (10222212).

Almost surely, 2^120102009 is an apocalyptic number.

It is an amenable number.

120102009 is a deficient number, since it is larger than the sum of its proper divisors (43453383).

120102009 is a wasteful number, since it uses less digits than its factorization.

120102009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 120102009 is about 10959.1062135559. The cubic root of 120102009 is about 493.3821396300.

The spelling of 120102009 in words is "one hundred twenty million, one hundred two thousand, nine".