1021222111109 has 2 divisors, whose sum is σ = 1021222111110. Its totient is φ = 1021222111108.

The previous prime is 1021222111099. The next prime is 1021222111177. The reversal of 1021222111109 is 9011112221201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954376594084 + 66845517025 = 976922^2 + 258545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021222111109 - 2¹⁶ = 1021222045573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021222111199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510611055554 + 510611055555.

It is an arithmetic number, because the mean of its divisors is an integer number (510611055555).

Almost surely, 2^{1021222111109} is an apocalyptic number.

It is an amenable number.

1021222111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021222111109 is an equidigital number, since it uses as much as digits as its factorization.

1021222111109 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 23.

The spelling of 1021222111109 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, one hundred nine".