111010220202221 has 2 divisors, whose sum is σ = 111010220202222. Its totient is φ = 111010220202220.

The previous prime is 111010220202209. The next prime is 111010220202263. The reversal of 111010220202221 is 122202022010111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82075083820900 + 28935136381321 = 9059530^2 + 5379139^2 .

It is a cyclic number.

It is not a de Polignac number, because 111010220202221 - 2⁶ = 111010220202157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111010220202221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111010220202121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505110101110 + 55505110101111.

It is an arithmetic number, because the mean of its divisors is an integer number (55505110101111).

Almost surely, 2^{111010220202221} is an apocalyptic number.

It is an amenable number.

111010220202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111010220202221 is an equidigital number, since it uses as much as digits as its factorization.

111010220202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111010220202221 its reverse (122202022010111), we get a palindrome (233212242212332).

The spelling of 111010220202221 in words is "one hundred eleven trillion, ten billion, two hundred twenty million, two hundred two thousand, two hundred twenty-one".