110021120200021 has 4 divisors (see below), whose sum is σ = 111528258832972. Its totient is φ = 108513981567072.

The previous prime is 110021120200007. The next prime is 110021120200049. The reversal of 110021120200021 is 120002021120011.

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 93350108709796 + 16671011490225 = 9661786^2 + 4083015^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021120200021 - 2¹⁵ = 110021120167253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021120199974 and 110021120200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021120201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753569316366 + ... + 753569316511.

It is an arithmetic number, because the mean of its divisors is an integer number (27882064708243).

Almost surely, 2^{110021120200021} is an apocalyptic number.

It is an amenable number.

110021120200021 is a deficient number, since it is larger than the sum of its proper divisors (1507138632951).

110021120200021 is an equidigital number, since it uses as much as digits as its factorization.

110021120200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507138632950.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 110021120200021 its reverse (120002021120011), we get a palindrome (230023141320032).

The spelling of 110021120200021 in words is "one hundred ten trillion, twenty-one billion, one hundred twenty million, two hundred thousand, twenty-one".