1101221121109 has 2 divisors, whose sum is σ = 1101221121110. Its totient is φ = 1101221121108.

The previous prime is 1101221121097. The next prime is 1101221121139. The reversal of 1101221121109 is 9011211221011.

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., 849628593009 + 251592528100 = 921753^2 + 501590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101221121109 - 2³⁷ = 963782167637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101221121109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101221121139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610560554 + 550610560555.

It is an arithmetic number, because the mean of its divisors is an integer number (550610560555).

Almost surely, 2^{1101221121109} is an apocalyptic number.

It is an amenable number.

1101221121109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101221121109 is an equidigital number, since it uses as much as digits as its factorization.

1101221121109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 1101221121109 in words is "one trillion, one hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred nine".