319121111 has 2 divisors, whose sum is σ = 319121112. Its totient is φ = 319121110.

The previous prime is 319121071. The next prime is 319121177. The reversal of 319121111 is 111121913.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 319121111 - 2¹⁴ = 319104727 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319121611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159560555 + 159560556.

It is an arithmetic number, because the mean of its divisors is an integer number (159560556).

Almost surely, 2^319121111 is an apocalyptic number.

319121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

319121111 is an equidigital number, since it uses as much as digits as its factorization.

319121111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 20.

The square root of 319121111 is about 17863.9612348437. The cubic root of 319121111 is about 683.3636048986.

The spelling of 319121111 in words is "three hundred nineteen million, one hundred twenty-one thousand, one hundred eleven".