1211222301109 has 2 divisors, whose sum is σ = 1211222301110. Its totient is φ = 1211222301108.

The previous prime is 1211222301083. The next prime is 1211222301161. The reversal of 1211222301109 is 9011032221121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999090207025 + 212132094084 = 999545^2 + 460578^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211222301109 - 2²¹ = 1211220203957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211222302109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611150554 + 605611150555.

It is an arithmetic number, because the mean of its divisors is an integer number (605611150555).

Almost surely, 2^{1211222301109} is an apocalyptic number.

It is an amenable number.

1211222301109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211222301109 is an equidigital number, since it uses as much as digits as its factorization.

1211222301109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 1211222301109 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, three hundred one thousand, one hundred nine".