2211222122209 has 2 divisors, whose sum is σ = 2211222122210. Its totient is φ = 2211222122208.

The previous prime is 2211222122189. The next prime is 2211222122269. The reversal of 2211222122209 is 9022212221122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2210217422400 + 1004699809 = 1486680^2 + 31697^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211222122209 - 2³³ = 2202632187617 is a prime.

It is a super-3 number, since 3×2211222122209³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2211222122269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105611061104 + 1105611061105.

It is an arithmetic number, because the mean of its divisors is an integer number (1105611061105).

Almost surely, 2^{2211222122209} is an apocalyptic number.

It is an amenable number.

2211222122209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211222122209 is an equidigital number, since it uses as much as digits as its factorization.

2211222122209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 2211222122209 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred nine".