11223811 has 2 divisors, whose sum is σ = 11223812. Its totient is φ = 11223810.

The previous prime is 11223809. The next prime is 11223857. The reversal of 11223811 is 11832211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11223811 - 2¹ = 11223809 is a prime.

Together with 11223809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11223871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611905 + 5611906.

It is an arithmetic number, because the mean of its divisors is an integer number (5611906).

Almost surely, 2^11223811 is an apocalyptic number.

11223811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223811 is an equidigital number, since it uses as much as digits as its factorization.

11223811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 19.

The square root of 11223811 is about 3350.1956659276. The cubic root of 11223811 is about 223.8962303686.

Subtracting 11223811 from its reverse (11832211), we obtain a square (608400 = 780²).

The spelling of 11223811 in words is "eleven million, two hundred twenty-three thousand, eight hundred eleven".