220111201909 has 2 divisors, whose sum is σ = 220111201910. Its totient is φ = 220111201908.

The previous prime is 220111201907. The next prime is 220111201949. The reversal of 220111201909 is 909102111022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200010200625 + 20101001284 = 447225^2 + 141778^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111201909 - 2¹ = 220111201907 is a prime.

Together with 220111201907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220111201907) 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, 110055600954 + 110055600955.

It is an arithmetic number, because the mean of its divisors is an integer number (110055600955).

Almost surely, 2^220111201909 is an apocalyptic number.

It is an amenable number.

220111201909 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111201909 is an equidigital number, since it uses as much as digits as its factorization.

220111201909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 220111201909 in words is "two hundred twenty billion, one hundred eleven million, two hundred one thousand, nine hundred nine".