110221031021 has 4 divisors (see below), whose sum is σ = 110222134044. Its totient is φ = 110219928000.

The previous prime is 110221031009. The next prime is 110221031029. The reversal of 110221031021 is 120130122011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 67376584900 + 42844446121 = 259570^2 + 206989^2 .

It is a cyclic number.

It is not a de Polignac number, because 110221031021 - 2¹⁸ = 110220768877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110221030987 and 110221031005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110221031029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384830 + ... + 607071.

It is an arithmetic number, because the mean of its divisors is an integer number (27555533511).

Almost surely, 2^110221031021 is an apocalyptic number.

It is an amenable number.

110221031021 is a deficient number, since it is larger than the sum of its proper divisors (1103023).

110221031021 is an equidigital number, since it uses as much as digits as its factorization.

110221031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103022.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 110221031021 its reverse (120130122011), we get a palindrome (230351153032).

The spelling of 110221031021 in words is "one hundred ten billion, two hundred twenty-one million, thirty-one thousand, twenty-one".