1211222210069 has 2 divisors, whose sum is σ = 1211222210070. Its totient is φ = 1211222210068.

The previous prime is 1211222210041. The next prime is 1211222210111. The reversal of 1211222210069 is 9600122221121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203025080625 + 8197129444 = 1096825^2 + 90538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211222210069 is a prime.

It is a super-2 number, since 2×1211222210069² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211222210269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611105034 + 605611105035.

It is an arithmetic number, because the mean of its divisors is an integer number (605611105035).

Almost surely, 2^{1211222210069} is an apocalyptic number.

It is an amenable number.

1211222210069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211222210069 is an equidigital number, since it uses as much as digits as its factorization.

1211222210069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 1211222210069 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred ten thousand, sixty-nine".