111120220205221 has 2 divisors, whose sum is σ = 111120220205222. Its totient is φ = 111120220205220.

The previous prime is 111120220205219. The next prime is 111120220205387. The reversal of 111120220205221 is 122502022021111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67876260077025 + 43243960128196 = 8238705^2 + 6576014^2 .

It is an emirp because it is prime and its reverse (122502022021111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111120220205221 - 2¹ = 111120220205219 is a prime.

Together with 111120220205219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111120220205192 and 111120220205201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120230205221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560110102610 + 55560110102611.

It is an arithmetic number, because the mean of its divisors is an integer number (55560110102611).

Almost surely, 2^{111120220205221} is an apocalyptic number.

It is an amenable number.

111120220205221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120220205221 is an equidigital number, since it uses as much as digits as its factorization.

111120220205221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 111120220205221 its reverse (122502022021111), we get a palindrome (233622242226332).

The spelling of 111120220205221 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred twenty million, two hundred five thousand, two hundred twenty-one".