111221560705 has 16 divisors (see below), whose sum is σ = 135409757184. Its totient is φ = 87682512960.

The previous prime is 111221560691. The next prime is 111221560717. The reversal of 111221560705 is 507065122111.

It is not a de Polignac number, because 111221560705 - 2⁷ = 111221560577 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 15 ways as a sum of consecutive naturals, for example, 687667 + ... + 833863.

It is an arithmetic number, because the mean of its divisors is an integer number (8463109824).

Almost surely, 2^111221560705 is an apocalyptic number.

It is an amenable number.

111221560705 is a deficient number, since it is larger than the sum of its proper divisors (24188196479).

111221560705 is a wasteful number, since it uses less digits than its factorization.

111221560705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148416.

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 111221560705 its reverse (507065122111), we get a palindrome (618286682816).

The spelling of 111221560705 in words is "one hundred eleven billion, two hundred twenty-one million, five hundred sixty thousand, seven hundred five".