211222000009 has 2 divisors, whose sum is σ = 211222000010. Its totient is φ = 211222000008.

The previous prime is 211222000001. The next prime is 211222000013. The reversal of 211222000009 is 900000222112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175165686784 + 36056313225 = 418528^2 + 189885^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222000009 - 2³ = 211222000001 is a prime.

It is a super-2 number, since 2×211222000009² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211222000009.

It is not a weakly prime, because it can be changed into another prime (211222000001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611000004 + 105611000005.

It is an arithmetic number, because the mean of its divisors is an integer number (105611000005).

Almost surely, 2^211222000009 is an apocalyptic number.

It is an amenable number.

211222000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222000009 is an equidigital number, since it uses as much as digits as its factorization.

211222000009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 211222000009 in words is "two hundred eleven billion, two hundred twenty-two million, nine", and thus it is an aban number.