110221020110021 has 4 divisors (see below), whose sum is σ = 110223525348012. Its totient is φ = 110218514872032.

The previous prime is 110221020110017. The next prime is 110221020110053. The reversal of 110221020110021 is 120011020122011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79051410259396 + 31169609850625 = 8891086^2 + 5582975^2 .

It is a cyclic number.

It is not a de Polignac number, because 110221020110021 - 2² = 110221020110017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110221020109978 and 110221020110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110221020110321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252553000 + ... + 1252640993.

It is an arithmetic number, because the mean of its divisors is an integer number (27555881337003).

Almost surely, 2^{110221020110021} is an apocalyptic number.

It is an amenable number.

110221020110021 is a deficient number, since it is larger than the sum of its proper divisors (2505237991).

110221020110021 is an equidigital number, since it uses as much as digits as its factorization.

110221020110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505237990.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 110221020110021 its reverse (120011020122011), we get a palindrome (230232040232032).

The spelling of 110221020110021 in words is "one hundred ten trillion, two hundred twenty-one billion, twenty million, one hundred ten thousand, twenty-one".