221120122109 has 2 divisors, whose sum is σ = 221120122110. Its totient is φ = 221120122108.

The previous prime is 221120122099. The next prime is 221120122117. The reversal of 221120122109 is 901221021122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121816356484 + 99303765625 = 349022^2 + 315125^2 .

It is a cyclic number.

It is not a de Polignac number, because 221120122109 - 2⁸ = 221120121853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221120122199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560061054 + 110560061055.

It is an arithmetic number, because the mean of its divisors is an integer number (110560061055).

Almost surely, 2^221120122109 is an apocalyptic number.

It is an amenable number.

221120122109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120122109 is an equidigital number, since it uses as much as digits as its factorization.

221120122109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 221120122109 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, one hundred nine".