120220909 has 2 divisors, whose sum is σ = 120220910. Its totient is φ = 120220908.

The previous prime is 120220873. The next prime is 120220943. The reversal of 120220909 is 909022021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91298025 + 28922884 = 9555^2 + 5378^2 .

It is a cyclic number.

It is not a de Polignac number, because 120220909 - 2⁷ = 120220781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120260909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60110454 + 60110455.

It is an arithmetic number, because the mean of its divisors is an integer number (60110455).

Almost surely, 2^120220909 is an apocalyptic number.

It is an amenable number.

120220909 is a deficient number, since it is larger than the sum of its proper divisors (1).

120220909 is an equidigital number, since it uses as much as digits as its factorization.

120220909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 120220909 is about 10964.5295840725. The cubic root of 120220909 is about 493.5449006830.

The spelling of 120220909 in words is "one hundred twenty million, two hundred twenty thousand, nine hundred nine".