2311311332009 has 2 divisors, whose sum is σ = 2311311332010. Its totient is φ = 2311311332008.

The previous prime is 2311311331993. The next prime is 2311311332041. The reversal of 2311311332009 is 9002331131132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1831699680409 + 479611651600 = 1353403^2 + 692540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311311332009 - 2⁴ = 2311311331993 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311311332509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155655666004 + 1155655666005.

It is an arithmetic number, because the mean of its divisors is an integer number (1155655666005).

Almost surely, 2^{2311311332009} is an apocalyptic number.

It is an amenable number.

2311311332009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311311332009 is an equidigital number, since it uses as much as digits as its factorization.

2311311332009 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2311311332009 in words is "two trillion, three hundred eleven billion, three hundred eleven million, three hundred thirty-two thousand, nine".