3111111109 has 2 divisors, whose sum is σ = 3111111110. Its totient is φ = 3111111108.

The previous prime is 3111111089. The next prime is 3111111121. The reversal of 3111111109 is 9011111113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2398060900 + 713050209 = 48970^2 + 26703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111111109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3111111149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555555554 + 1555555555.

It is an arithmetic number, because the mean of its divisors is an integer number (1555555555).

Almost surely, 2^3111111109 is an apocalyptic number.

It is an amenable number.

3111111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111111109 is an equidigital number, since it uses as much as digits as its factorization.

3111111109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 19.

The square root of 3111111109 is about 55777.3350833473. The cubic root of 3111111109 is about 1459.8397129658.

The spelling of 3111111109 in words is "three billion, one hundred eleven million, one hundred eleven thousand, one hundred nine".