3111203213309 has 2 divisors, whose sum is σ = 3111203213310. Its totient is φ = 3111203213308.

The previous prime is 3111203213273. The next prime is 3111203213329. The reversal of 3111203213309 is 9033123021113.

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., 2877019807684 + 234183405625 = 1696178^2 + 483925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111203213309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3111203213329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555601606654 + 1555601606655.

It is an arithmetic number, because the mean of its divisors is an integer number (1555601606655).

Almost surely, 2^{3111203213309} is an apocalyptic number.

It is an amenable number.

3111203213309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111203213309 is an equidigital number, since it uses as much as digits as its factorization.

3111203213309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The spelling of 3111203213309 in words is "three trillion, one hundred eleven billion, two hundred three million, two hundred thirteen thousand, three hundred nine".