110203130021 has 4 divisors (see below), whose sum is σ = 110238809100. Its totient is φ = 110167450944.

The previous prime is 110203130017. The next prime is 110203130047. The reversal of 110203130021 is 120031302011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120031302011 = 131 ⋅916269481.

It can be written as a sum of positive squares in 2 ways, for example, as 39566779396 + 70636350625 = 198914^2 + 265775^2 .

It is a cyclic number.

It is not a de Polignac number, because 110203130021 - 2² = 110203130017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110203129978 and 110203130005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110203130321) 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, 17834906 + ... + 17841083.

It is an arithmetic number, because the mean of its divisors is an integer number (27559702275).

Almost surely, 2^110203130021 is an apocalyptic number.

It is an amenable number.

110203130021 is a deficient number, since it is larger than the sum of its proper divisors (35679079).

110203130021 is an equidigital number, since it uses as much as digits as its factorization.

110203130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35679078.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 110203130021 its reverse (120031302011), we get a palindrome (230234432032).

The spelling of 110203130021 in words is "one hundred ten billion, two hundred three million, one hundred thirty thousand, twenty-one".