110001020221 has 2 divisors, whose sum is σ = 110001020222. Its totient is φ = 110001020220.

The previous prime is 110001020209. The next prime is 110001020231. The reversal of 110001020221 is 122020100011.

It is an a-pointer prime, because the next prime (110001020231) can be obtained adding 110001020221 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109965855321 + 35164900 = 331611^2 + 5930^2 .

It is an emirp because it is prime and its reverse (122020100011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110001020221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110001020198 and 110001020207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110001020231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000510110 + 55000510111.

It is an arithmetic number, because the mean of its divisors is an integer number (55000510111).

Almost surely, 2^110001020221 is an apocalyptic number.

It is an amenable number.

110001020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110001020221 is an equidigital number, since it uses as much as digits as its factorization.

110001020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 110001020221 its reverse (122020100011), we get a palindrome (232021120232).

The spelling of 110001020221 in words is "one hundred ten billion, one million, twenty thousand, two hundred twenty-one".