111222022100221 has 2 divisors, whose sum is σ = 111222022100222. Its totient is φ = 111222022100220.

The previous prime is 111222022100201. The next prime is 111222022100237. The reversal of 111222022100221 is 122001220222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109811830224996 + 1410191875225 = 10479114^2 + 1187515^2 .

It is a cyclic number.

It is not a de Polignac number, because 111222022100221 - 2³¹ = 111219874616573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111222022100201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611011050110 + 55611011050111.

It is an arithmetic number, because the mean of its divisors is an integer number (55611011050111).

Almost surely, 2^{111222022100221} is an apocalyptic number.

It is an amenable number.

111222022100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222022100221 is an equidigital number, since it uses as much as digits as its factorization.

111222022100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111222022100221 its reverse (122001220222111), we get a palindrome (233223242322332).

The spelling of 111222022100221 in words is "one hundred eleven trillion, two hundred twenty-two billion, twenty-two million, one hundred thousand, two hundred twenty-one".