2211040691 has 2 divisors, whose sum is σ = 2211040692. Its totient is φ = 2211040690.

The previous prime is 2211040687. The next prime is 2211040739. The reversal of 2211040691 is 1960401122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2211040691 - 2² = 2211040687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211040691.

It is not a weakly prime, because it can be changed into another prime (2211040681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105520345 + 1105520346.

It is an arithmetic number, because the mean of its divisors is an integer number (1105520346).

Almost surely, 2^2211040691 is an apocalyptic number.

2211040691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211040691 is an equidigital number, since it uses as much as digits as its factorization.

2211040691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2211040691 is about 47021.7044671926. The cubic root of 2211040691 is about 1302.7634883847.

The spelling of 2211040691 in words is "two billion, two hundred eleven million, forty thousand, six hundred ninety-one".