110139221 has 4 divisors (see below), whose sum is σ = 111944844. Its totient is φ = 108333600.

The previous prime is 110139217. The next prime is 110139229. The reversal of 110139221 is 122931011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122931011 = 7 ⋅17561573.

It can be written as a sum of positive squares in 2 ways, for example, as 12327121 + 97812100 = 3511^2 + 9890^2 .

It is a cyclic number.

It is not a de Polignac number, because 110139221 - 2² = 110139217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110139193 and 110139202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110139229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902720 + ... + 902841.

It is an arithmetic number, because the mean of its divisors is an integer number (27986211).

Almost surely, 2^110139221 is an apocalyptic number.

It is an amenable number.

110139221 is a deficient number, since it is larger than the sum of its proper divisors (1805623).

110139221 is an equidigital number, since it uses as much as digits as its factorization.

110139221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805622.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 110139221 is about 10494.7234837322. The cubic root of 110139221 is about 479.3440417786.

The spelling of 110139221 in words is "one hundred ten million, one hundred thirty-nine thousand, two hundred twenty-one".