110021221 has 4 divisors (see below), whose sum is σ = 111030700. Its totient is φ = 109011744.

The previous prime is 110021209. The next prime is 110021227. The reversal of 110021221 is 122120011.

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 74200996 + 35820225 = 8614^2 + 5985^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021221 - 2⁵ = 110021189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021198 and 110021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021227) 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, 504576 + ... + 504793.

It is an arithmetic number, because the mean of its divisors is an integer number (27757675).

Almost surely, 2^110021221 is an apocalyptic number.

It is an amenable number.

110021221 is a deficient number, since it is larger than the sum of its proper divisors (1009479).

110021221 is a wasteful number, since it uses less digits than its factorization.

110021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009478.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 110021221 is about 10489.1001043941. The cubic root of 110021221 is about 479.1727954587.

Adding to 110021221 its reverse (122120011), we get a palindrome (232141232).

The spelling of 110021221 in words is "one hundred ten million, twenty-one thousand, two hundred twenty-one".