110221021021 has 2 divisors, whose sum is σ = 110221021022. Its totient is φ = 110221021020.

The previous prime is 110221021013. The next prime is 110221021033. The reversal of 110221021021 is 120120122011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107853128100 + 2367892921 = 328410^2 + 48661^2 .

It is an emirp because it is prime and its reverse (120120122011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110221021021 - 2³ = 110221021013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110221020992 and 110221021010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110221021051) 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, 55110510510 + 55110510511.

It is an arithmetic number, because the mean of its divisors is an integer number (55110510511).

Almost surely, 2^110221021021 is an apocalyptic number.

It is an amenable number.

110221021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110221021021 is an equidigital number, since it uses as much as digits as its factorization.

110221021021 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 110221021021 its reverse (120120122011), we get a palindrome (230341143032).

The spelling of 110221021021 in words is "one hundred ten billion, two hundred twenty-one million, twenty-one thousand, twenty-one".