220121220111109 has 2 divisors, whose sum is σ = 220121220111110. Its totient is φ = 220121220111108.

The previous prime is 220121220111071. The next prime is 220121220111269. The reversal of 220121220111109 is 901111022121022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117766924090209 + 102354296020900 = 10852047^2 + 10117030^2 .

It is a cyclic number.

It is not a de Polignac number, because 220121220111109 - 2²³ = 220121211722501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121224111109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060610055554 + 110060610055555.

It is an arithmetic number, because the mean of its divisors is an integer number (110060610055555).

Almost surely, 2^{220121220111109} is an apocalyptic number.

It is an amenable number.

220121220111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121220111109 is an equidigital number, since it uses as much as digits as its factorization.

220121220111109 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 220121220111109 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, one hundred nine".