222222220811 has 2 divisors, whose sum is σ = 222222220812. Its totient is φ = 222222220810.

The previous prime is 222222220799. The next prime is 222222220837. The reversal of 222222220811 is 118022222222.

It is an a-pointer prime, because the next prime (222222220837) can be obtained adding 222222220811 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222222220811 - 2¹⁰ = 222222219787 is a prime.

It is not a weakly prime, because it can be changed into another prime (222222120811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111110405 + 111111110406.

It is an arithmetic number, because the mean of its divisors is an integer number (111111110406).

Almost surely, 2^222222220811 is an apocalyptic number.

222222220811 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222220811 is an equidigital number, since it uses as much as digits as its factorization.

222222220811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 26.

The spelling of 222222220811 in words is "two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty thousand, eight hundred eleven".