110221121221 has 4 divisors (see below), whose sum is σ = 110338754092. Its totient is φ = 110103488352.

The previous prime is 110221121207. The next prime is 110221121287. The reversal of 110221121221 is 122121122011.

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 17659752100 + 92561369121 = 132890^2 + 304239^2 .

It is a cyclic number.

It is not a de Polignac number, because 110221121221 - 2²⁹ = 109684250309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110221121195 and 110221121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110221121201) 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, 58815030 + ... + 58816903.

It is an arithmetic number, because the mean of its divisors is an integer number (27584688523).

Almost surely, 2^110221121221 is an apocalyptic number.

It is an amenable number.

110221121221 is a deficient number, since it is larger than the sum of its proper divisors (117632871).

110221121221 is an equidigital number, since it uses as much as digits as its factorization.

110221121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117632870.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 110221121221 its reverse (122121122011), we get a palindrome (232342243232).

The spelling of 110221121221 in words is "one hundred ten billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".