110202020021 has 8 divisors (see below), whose sum is σ = 110378712024. Its totient is φ = 110025457920.

The previous prime is 110202020011. The next prime is 110202020069. The reversal of 110202020021 is 120020202011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2834391121 + 107367628900 = 53239^2 + 327670^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 110202020021 - 2⁶ = 110202019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110202019984 and 110202020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110202020011) 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 7 ways as a sum of consecutive naturals, for example, 1742465 + ... + 1804601.

It is an arithmetic number, because the mean of its divisors is an integer number (13797339003).

Almost surely, 2^110202020021 is an apocalyptic number.

It is an amenable number.

110202020021 is a deficient number, since it is larger than the sum of its proper divisors (176692003).

110202020021 is an equidigital number, since it uses as much as digits as its factorization.

110202020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64951.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 110202020021 its reverse (120020202011), we get a palindrome (230222222032).

The spelling of 110202020021 in words is "one hundred ten billion, two hundred two million, twenty thousand, twenty-one".