2121110305 has 8 divisors (see below), whose sum is σ = 2545579944. Its totient is φ = 1696723200.

The previous prime is 2121110293. The next prime is 2121110317. The reversal of 2121110305 is 5030111212.

It is an interprime number because it is at equal distance from previous prime (2121110293) and next prime (2121110317).

It can be written as a sum of positive squares in 4 ways, for example, as 107972881 + 2013137424 = 10391^2 + 44868^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121110305 - 2²³ = 2112721697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86295 + ... + 108115.

It is an arithmetic number, because the mean of its divisors is an integer number (318197493).

Almost surely, 2^2121110305 is an apocalyptic number.

It is an amenable number.

2121110305 is a deficient number, since it is larger than the sum of its proper divisors (424469639).

2121110305 is a wasteful number, since it uses less digits than its factorization.

2121110305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41267.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2121110305 is about 46055.5132964556. The cubic root of 2121110305 is about 1284.8558847598.

Adding to 2121110305 its reverse (5030111212), we get a palindrome (7151221517).

The spelling of 2121110305 in words is "two billion, one hundred twenty-one million, one hundred ten thousand, three hundred five".