120111120209 has 2 divisors, whose sum is σ = 120111120210. Its totient is φ = 120111120208.

The previous prime is 120111120193. The next prime is 120111120211. The reversal of 120111120209 is 902021111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74977392400 + 45133727809 = 273820^2 + 212447^2 .

It is a cyclic number.

It is not a de Polignac number, because 120111120209 - 2⁴ = 120111120193 is a prime.

Together with 120111120211, 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 (120111128209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60055560104 + 60055560105.

It is an arithmetic number, because the mean of its divisors is an integer number (60055560105).

Almost surely, 2^120111120209 is an apocalyptic number.

It is an amenable number.

120111120209 is a deficient number, since it is larger than the sum of its proper divisors (1).

120111120209 is an equidigital number, since it uses as much as digits as its factorization.

120111120209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 120111120209 in words is "one hundred twenty billion, one hundred eleven million, one hundred twenty thousand, two hundred nine".