111110202221 has 2 divisors, whose sum is σ = 111110202222. Its totient is φ = 111110202220.

The previous prime is 111110202167. The next prime is 111110202223. The reversal of 111110202221 is 122202011111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91757497225 + 19352704996 = 302915^2 + 139114^2 .

It is an emirp because it is prime and its reverse (122202011111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111110202221 - 2³⁰ = 110036460397 is a prime.

Together with 111110202223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 111110202196 and 111110202205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111110202223) 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, 55555101110 + 55555101111.

It is an arithmetic number, because the mean of its divisors is an integer number (55555101111).

Almost surely, 2^111110202221 is an apocalyptic number.

It is an amenable number.

111110202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110202221 is an equidigital number, since it uses as much as digits as its factorization.

111110202221 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 14.

Adding to 111110202221 its reverse (122202011111), we get a palindrome (233312213332).

The spelling of 111110202221 in words is "one hundred eleven billion, one hundred ten million, two hundred two thousand, two hundred twenty-one".