111200201221 has 2 divisors, whose sum is σ = 111200201222. Its totient is φ = 111200201220.

The previous prime is 111200201179. The next prime is 111200201227. The reversal of 111200201221 is 122102002111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64204464996 + 46995736225 = 253386^2 + 216785^2 .

It is a cyclic number.

It is not a de Polignac number, because 111200201221 - 2¹³ = 111200193029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111200201227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600100610 + 55600100611.

It is an arithmetic number, because the mean of its divisors is an integer number (55600100611).

Almost surely, 2^111200201221 is an apocalyptic number.

It is an amenable number.

111200201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111200201221 is an equidigital number, since it uses as much as digits as its factorization.

111200201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111200201221 its reverse (122102002111), we get a palindrome (233302203332).

The spelling of 111200201221 in words is "one hundred eleven billion, two hundred million, two hundred one thousand, two hundred twenty-one".