110111220221 has 4 divisors (see below), whose sum is σ = 110426725500. Its totient is φ = 109795714944.

The previous prime is 110111220209. The next prime is 110111220253. The reversal of 110111220221 is 122022111011.

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 66210494596 + 43900725625 = 257314^2 + 209525^2 .

It is a cyclic number.

It is not a de Polignac number, because 110111220221 - 2⁶ = 110111220157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110111220196 and 110111220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111220281) 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, 157752116 + ... + 157752813.

It is an arithmetic number, because the mean of its divisors is an integer number (27606681375).

Almost surely, 2^110111220221 is an apocalyptic number.

It is an amenable number.

110111220221 is a deficient number, since it is larger than the sum of its proper divisors (315505279).

110111220221 is an equidigital number, since it uses as much as digits as its factorization.

110111220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315505278.

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

Adding to 110111220221 its reverse (122022111011), we get a palindrome (232133331232).

It can be divided in two parts, 11011 and 1220221, that multiplied together give a palindrome (13435853431).

The spelling of 110111220221 in words is "one hundred ten billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-one".