11722811 has 2 divisors, whose sum is σ = 11722812. Its totient is φ = 11722810.

The previous prime is 11722783. The next prime is 11722817. The reversal of 11722811 is 11822711.

11722811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (11822711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11722811 - 2¹⁴ = 11706427 is a prime.

It is not a weakly prime, because it can be changed into another prime (11722817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5861405 + 5861406.

It is an arithmetic number, because the mean of its divisors is an integer number (5861406).

Almost surely, 2^11722811 is an apocalyptic number.

11722811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11722811 is an equidigital number, since it uses as much as digits as its factorization.

11722811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 23.

The square root of 11722811 is about 3423.8590800440. The cubic root of 11722811 is about 227.1663086800.

The spelling of 11722811 in words is "eleven million, seven hundred twenty-two thousand, eight hundred eleven".