111215012105 has 16 divisors (see below), whose sum is σ = 133900506000. Its totient is φ = 88677396480.

The previous prime is 111215012089. The next prime is 111215012171. The reversal of 111215012105 is 501210512111.

It can be written as a sum of positive squares in 8 ways, for example, as 762477769 + 110452534336 = 27613^2 + 332344^2 .

It is not a de Polignac number, because 111215012105 - 2⁴ = 111215012089 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2392121 + ... + 2438169.

It is an arithmetic number, because the mean of its divisors is an integer number (8368781625).

Almost surely, 2^111215012105 is an apocalyptic number.

It is an amenable number.

111215012105 is a deficient number, since it is larger than the sum of its proper divisors (22685493895).

111215012105 is a wasteful number, since it uses less digits than its factorization.

111215012105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47644.

The product of its (nonzero) digits is 100, while the sum is 20.

Adding to 111215012105 its reverse (501210512111), we get a palindrome (612425524216).

The spelling of 111215012105 in words is "one hundred eleven billion, two hundred fifteen million, twelve thousand, one hundred five".