120100909 has 2 divisors, whose sum is σ = 120100910. Its totient is φ = 120100908.

The previous prime is 120100907. The next prime is 120100943. The reversal of 120100909 is 909001021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105124009 + 14976900 = 10253^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 120100909 - 2¹ = 120100907 is a prime.

Together with 120100907, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 120100909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120100907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60050454 + 60050455.

It is an arithmetic number, because the mean of its divisors is an integer number (60050455).

Almost surely, 2^120100909 is an apocalyptic number.

It is an amenable number.

120100909 is a deficient number, since it is larger than the sum of its proper divisors (1).

120100909 is an equidigital number, since it uses as much as digits as its factorization.

120100909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 120100909 is about 10959.0560268665. The cubic root of 120100909 is about 493.3806333493.

The spelling of 120100909 in words is "one hundred twenty million, one hundred thousand, nine hundred nine".