120684231209 has 2 divisors, whose sum is σ = 120684231210. Its totient is φ = 120684231208.

The previous prime is 120684231131. The next prime is 120684231211. The reversal of 120684231209 is 902132486021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104739613225 + 15944617984 = 323635^2 + 126272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120684231209 is a prime.

Together with 120684231211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120684231229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60342115604 + 60342115605.

It is an arithmetic number, because the mean of its divisors is an integer number (60342115605).

Almost surely, 2^120684231209 is an apocalyptic number.

It is an amenable number.

120684231209 is a deficient number, since it is larger than the sum of its proper divisors (1).

120684231209 is an equidigital number, since it uses as much as digits as its factorization.

120684231209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 120684231209 in words is "one hundred twenty billion, six hundred eighty-four million, two hundred thirty-one thousand, two hundred nine".