3115211213209 has 2 divisors, whose sum is σ = 3115211213210. Its totient is φ = 3115211213208.

The previous prime is 3115211213189. The next prime is 3115211213227. The reversal of 3115211213209 is 9023121125113.

3115211213209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2684616710400 + 430594502809 = 1638480^2 + 656197^2 .

It is a cyclic number.

It is not a de Polignac number, because 3115211213209 - 2⁹ = 3115211212697 is a prime.

It is not a weakly prime, because it can be changed into another prime (3115211213249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1557605606604 + 1557605606605.

It is an arithmetic number, because the mean of its divisors is an integer number (1557605606605).

Almost surely, 2^{3115211213209} is an apocalyptic number.

It is an amenable number.

3115211213209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3115211213209 is an equidigital number, since it uses as much as digits as its factorization.

3115211213209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 3115211213209 in words is "three trillion, one hundred fifteen billion, two hundred eleven million, two hundred thirteen thousand, two hundred nine".