1020110221 has 4 divisors (see below), whose sum is σ = 1098580252. Its totient is φ = 941640192.

The previous prime is 1020110219. The next prime is 1020110233. The reversal of 1020110221 is 1220110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220110201 = 1823 ⋅669287.

It can be written as a sum of positive squares in 2 ways, for example, as 590004100 + 430106121 = 24290^2 + 20739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020110221 - 2¹ = 1020110219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020110198 and 1020110207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020110251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39234996 + ... + 39235021.

It is an arithmetic number, because the mean of its divisors is an integer number (274645063).

Almost surely, 2^1020110221 is an apocalyptic number.

It is an amenable number.

1020110221 is a deficient number, since it is larger than the sum of its proper divisors (78470031).

1020110221 is an equidigital number, since it uses as much as digits as its factorization.

1020110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78470030.

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

The square root of 1020110221 is about 31939.1643754185. The cubic root of 1020110221 is about 1006.6589667384.

Adding to 1020110221 its reverse (1220110201), we get a palindrome (2240220422).

The spelling of 1020110221 in words is "one billion, twenty million, one hundred ten thousand, two hundred twenty-one".