111010212102221 has 2 divisors, whose sum is σ = 111010212102222. Its totient is φ = 111010212102220.

The previous prime is 111010212102191. The next prime is 111010212102247. The reversal of 111010212102221 is 122201212010111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103497843745321 + 7512368356900 = 10173389^2 + 2740870^2 .

It is a cyclic number.

It is not a de Polignac number, because 111010212102221 - 2¹⁴ = 111010212085837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111010212102221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111010212102281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505106051110 + 55505106051111.

It is an arithmetic number, because the mean of its divisors is an integer number (55505106051111).

Almost surely, 2^{111010212102221} is an apocalyptic number.

It is an amenable number.

111010212102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111010212102221 is an equidigital number, since it uses as much as digits as its factorization.

111010212102221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111010212102221 its reverse (122201212010111), we get a palindrome (233211424112332).

The spelling of 111010212102221 in words is "one hundred eleven trillion, ten billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".