211122020121109 has 2 divisors, whose sum is σ = 211122020121110. Its totient is φ = 211122020121108.

The previous prime is 211122020121091. The next prime is 211122020121157. The reversal of 211122020121109 is 901121020221112.

Together with previous prime (211122020121091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184245603164100 + 26876416957009 = 13573710^2 + 5184247^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122020121109 - 2⁷ = 211122020120981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211122020122109) 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, 105561010060554 + 105561010060555.

It is an arithmetic number, because the mean of its divisors is an integer number (105561010060555).

Almost surely, 2^{211122020121109} is an apocalyptic number.

It is an amenable number.

211122020121109 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122020121109 is an equidigital number, since it uses as much as digits as its factorization.

211122020121109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 211122020121109 in words is "two hundred eleven trillion, one hundred twenty-two billion, twenty million, one hundred twenty-one thousand, one hundred nine".